Merge branch 'year-contribs'

12 files changed, 383 insertions, 36 deletions

diff --git a/asset-sources/theme.scss b/asset-sources/theme.scss
index ba05782..2faaffa 100644
--- a/asset-sources/theme.scss
+++ b/asset-sources/theme.scss
@@ -271,6 +271,39 @@ strong {
   }
 }
 
+.contribs-cell {
+  div {
+    border: 1px solid rgba(0, 0, 0, 0.175);
+    border-radius: calc(0.375rem - (1px));
+
+    width: 1.1em;
+    height: 1.1em;
+  }
+}
+
+.contribs-rowhead {
+  font-size: 90%;
+}
+
+.contribs-length-0 div {
+  background-color: #FFFFFF;
+}
+.contribs-length-1 div {
+  background-color: #8FF0A4;
+}
+.contribs-length-2 div {
+  background-color: #75DD95;
+}
+.contribs-length-3 div {
+  background-color: #5BC987;
+}
+.contribs-length-4 div {
+  background-color: #40B678;
+}
+.contribs-length-5 div {
+  background-color: #26A269;
+}
+
 .browse-summary {
   font-variant: lining-nums;
 }
diff --git a/babel.cfg b/babel.cfg
index 6de4aaa..650a00a 100644
--- a/babel.cfg
+++ b/babel.cfg
@@ -4,3 +4,4 @@ jinja2 = jinja2.ext:babel_extract
 [jinja2: **.jinja2]
 
 [python: **.py]
+keywords = _ pluralize:1,2
diff --git a/fietsboek/locale/de/LC_MESSAGES/messages.mo b/fietsboek/locale/de/LC_MESSAGES/messages.mo
index 356be25..25b4a89 100644
--- a/fietsboek/locale/de/LC_MESSAGES/messages.mo
+++ b/fietsboek/locale/de/LC_MESSAGES/messages.mo
diff --git a/fietsboek/locale/de/LC_MESSAGES/messages.po b/fietsboek/locale/de/LC_MESSAGES/messages.po
index 9367d28..bdd53a7 100644
--- a/fietsboek/locale/de/LC_MESSAGES/messages.po
+++ b/fietsboek/locale/de/LC_MESSAGES/messages.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-03 19:25+0100\n"
+"POT-Creation-Date: 2026-08-13 17:40+0200\n"
 "PO-Revision-Date: 2022-07-02 17:35+0200\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: de\n"
@@ -16,7 +16,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Generated-By: Babel 2.17.0\n"
+"Generated-By: Babel 2.18.0\n"
 
 #: fietsboek/actions.py:266
 msgid "email.verify_mail.subject"
@@ -61,6 +61,12 @@ msgstr "Maximalgeschwindigkeit"
 msgid "pdf.table.avg_speed"
 msgstr "Durchschnittsgeschwindigkeit"
 
+#: fietsboek/summaries.py:429
+msgid "page.profile.contribution_card.tooltip"
+msgid_plural "page.profile.contribution_card.tooltips"
+msgstr[0] "${count} Strecke am ${date}"
+msgstr[1] "${count} Strecken am ${date}"
+
 #: fietsboek/util.py:299
 msgid "password_constraint.mismatch"
 msgstr "Passwörter stimmen nicht überein"
@@ -1008,27 +1014,39 @@ msgstr "durchschnittliche Geschwindigkeit"
 msgid "page.profile.number_of_tracks"
 msgstr "Anzahl der Strecken"
 
-#: fietsboek/templates/profile_overview.jinja2:113
+#: fietsboek/templates/profile_overview.jinja2:112
+msgid "page.profile.contribution_card.title"
+msgstr "Streckenaktivität"
+
+#: fietsboek/templates/profile_overview.jinja2:147
+msgid "page.profile.contribution_card.legend.less"
+msgstr "Weniger km"
+
+#: fietsboek/templates/profile_overview.jinja2:154
+msgid "page.profile.contribution_card.legend.more"
+msgstr "Mehr km"
+
+#: fietsboek/templates/profile_overview.jinja2:161
 msgid "page.profile.longest_distance_track"
 msgstr "Weiteste Strecke"
 
-#: fietsboek/templates/profile_overview.jinja2:118
+#: fietsboek/templates/profile_overview.jinja2:166
 msgid "page.profile.shortest_distance_track"
 msgstr "Kürzeste Strecke"
 
-#: fietsboek/templates/profile_overview.jinja2:123
+#: fietsboek/templates/profile_overview.jinja2:171
 msgid "page.profile.longest_duration_track"
 msgstr "Am Längsten Dauernde Strecke"
 
-#: fietsboek/templates/profile_overview.jinja2:128
+#: fietsboek/templates/profile_overview.jinja2:176
 msgid "page.profile.shortest_duration_track"
 msgstr "Am Kürzesten Dauernde Strecke"
 
-#: fietsboek/templates/profile_overview.jinja2:149
+#: fietsboek/templates/profile_overview.jinja2:197
 msgid "page.profile.heatmap"
 msgstr "Heatmap"
 
-#: fietsboek/templates/profile_overview.jinja2:157
+#: fietsboek/templates/profile_overview.jinja2:205
 msgid "page.profile.tilehunt"
 msgstr "Kacheljäger"
 
diff --git a/fietsboek/locale/en/LC_MESSAGES/messages.mo b/fietsboek/locale/en/LC_MESSAGES/messages.mo
index f4b7bbf..b0c8a9c 100644
--- a/fietsboek/locale/en/LC_MESSAGES/messages.mo
+++ b/fietsboek/locale/en/LC_MESSAGES/messages.mo
diff --git a/fietsboek/locale/en/LC_MESSAGES/messages.po b/fietsboek/locale/en/LC_MESSAGES/messages.po
index d52960b..e75d0e0 100644
--- a/fietsboek/locale/en/LC_MESSAGES/messages.po
+++ b/fietsboek/locale/en/LC_MESSAGES/messages.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-03 19:25+0100\n"
+"POT-Creation-Date: 2026-08-13 17:40+0200\n"
 "PO-Revision-Date: 2023-04-03 20:42+0200\n"
 "Last-Translator: \n"
 "Language: en\n"
@@ -16,7 +16,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Generated-By: Babel 2.17.0\n"
+"Generated-By: Babel 2.18.0\n"
 
 #: fietsboek/actions.py:266
 msgid "email.verify_mail.subject"
@@ -61,6 +61,12 @@ msgstr "Max Speed"
 msgid "pdf.table.avg_speed"
 msgstr "Average Speed"
 
+#: fietsboek/summaries.py:429
+msgid "page.profile.contribution_card.tooltip"
+msgid_plural "page.profile.contribution_card.tooltips"
+msgstr[0] "${count} track on ${date}"
+msgstr[1] "${count} tracks on ${date}"
+
 #: fietsboek/util.py:299
 msgid "password_constraint.mismatch"
 msgstr "Passwords don't match"
@@ -1002,27 +1008,39 @@ msgstr "Average Speed"
 msgid "page.profile.number_of_tracks"
 msgstr "Number of tracks"
 
-#: fietsboek/templates/profile_overview.jinja2:113
+#: fietsboek/templates/profile_overview.jinja2:112
+msgid "page.profile.contribution_card.title"
+msgstr "Track Activity"
+
+#: fietsboek/templates/profile_overview.jinja2:147
+msgid "page.profile.contribution_card.legend.less"
+msgstr "Fewer km"
+
+#: fietsboek/templates/profile_overview.jinja2:154
+msgid "page.profile.contribution_card.legend.more"
+msgstr "More km"
+
+#: fietsboek/templates/profile_overview.jinja2:161
 msgid "page.profile.longest_distance_track"
 msgstr "Longest Track"
 
-#: fietsboek/templates/profile_overview.jinja2:118
+#: fietsboek/templates/profile_overview.jinja2:166
 msgid "page.profile.shortest_distance_track"
 msgstr "Shortest Track"
 
-#: fietsboek/templates/profile_overview.jinja2:123
+#: fietsboek/templates/profile_overview.jinja2:171
 msgid "page.profile.longest_duration_track"
 msgstr "Most Time-Consuming Track"
 
-#: fietsboek/templates/profile_overview.jinja2:128
+#: fietsboek/templates/profile_overview.jinja2:176
 msgid "page.profile.shortest_duration_track"
 msgstr "Quickest Track"
 
-#: fietsboek/templates/profile_overview.jinja2:149
+#: fietsboek/templates/profile_overview.jinja2:197
 msgid "page.profile.heatmap"
 msgstr "Heat Map"
 
-#: fietsboek/templates/profile_overview.jinja2:157
+#: fietsboek/templates/profile_overview.jinja2:205
 msgid "page.profile.tilehunt"
 msgstr "Tilehunt"
 
diff --git a/fietsboek/locale/fietslog.pot b/fietsboek/locale/fietslog.pot
index 50a43a0..53f697f 100644
--- a/fietsboek/locale/fietslog.pot
+++ b/fietsboek/locale/fietslog.pot
@@ -8,14 +8,14 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2026-01-03 19:25+0100\n"
+"POT-Creation-Date: 2026-08-13 17:40+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Generated-By: Babel 2.17.0\n"
+"Generated-By: Babel 2.18.0\n"
 
 #: fietsboek/actions.py:266
 msgid "email.verify_mail.subject"
@@ -57,6 +57,12 @@ msgstr ""
 msgid "pdf.table.avg_speed"
 msgstr ""
 
+#: fietsboek/summaries.py:429
+msgid "page.profile.contribution_card.tooltip"
+msgid_plural "page.profile.contribution_card.tooltips"
+msgstr[0] ""
+msgstr[1] ""
+
 #: fietsboek/util.py:299
 msgid "password_constraint.mismatch"
 msgstr ""
@@ -994,27 +1000,39 @@ msgstr ""
 msgid "page.profile.number_of_tracks"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:113
+#: fietsboek/templates/profile_overview.jinja2:112
+msgid "page.profile.contribution_card.title"
+msgstr ""
+
+#: fietsboek/templates/profile_overview.jinja2:147
+msgid "page.profile.contribution_card.legend.less"
+msgstr ""
+
+#: fietsboek/templates/profile_overview.jinja2:154
+msgid "page.profile.contribution_card.legend.more"
+msgstr ""
+
+#: fietsboek/templates/profile_overview.jinja2:161
 msgid "page.profile.longest_distance_track"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:118
+#: fietsboek/templates/profile_overview.jinja2:166
 msgid "page.profile.shortest_distance_track"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:123
+#: fietsboek/templates/profile_overview.jinja2:171
 msgid "page.profile.longest_duration_track"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:128
+#: fietsboek/templates/profile_overview.jinja2:176
 msgid "page.profile.shortest_duration_track"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:149
+#: fietsboek/templates/profile_overview.jinja2:197
 msgid "page.profile.heatmap"
 msgstr ""
 
-#: fietsboek/templates/profile_overview.jinja2:157
+#: fietsboek/templates/profile_overview.jinja2:205
 msgid "page.profile.tilehunt"
 msgstr ""
 
diff --git a/fietsboek/static/theme.css b/fietsboek/static/theme.css
index 65e6881..d12a9b7 100644
--- a/fietsboek/static/theme.css
+++ b/fietsboek/static/theme.css
@@ -80,14 +80,6 @@ strong {
   flex-wrap: wrap;
 }
 
-.track-image-preview {
-  position: relative;
-  width: min(317px, 100%);
-  height: 178.3125px;
-  border: 1px solid grey;
-  margin-right: 5px;
-  margin-bottom: 5px;
-}
 .track-image-preview .delete-image {
   position: absolute;
   z-index: 5;
@@ -120,6 +112,14 @@ strong {
   left: 50%;
   transform: translate(-50%, -50%);
 }
+.track-image-preview {
+  position: relative;
+  width: min(317px, 100%);
+  height: 178.3125px;
+  border: 1px solid grey;
+  margin-right: 5px;
+  margin-bottom: 5px;
+}
 
 .track-description img {
   max-width: 100%;
@@ -259,6 +259,41 @@ strong {
   color: inherit;
 }
 
+.contribs-cell div {
+  border: 1px solid rgba(0, 0, 0, 0.175);
+  border-radius: calc(0.375rem - 1px);
+  width: 1.1em;
+  height: 1.1em;
+}
+
+.contribs-rowhead {
+  font-size: 90%;
+}
+
+.contribs-length-0 div {
+  background-color: #FFFFFF;
+}
+
+.contribs-length-1 div {
+  background-color: #8FF0A4;
+}
+
+.contribs-length-2 div {
+  background-color: #75DD95;
+}
+
+.contribs-length-3 div {
+  background-color: #5BC987;
+}
+
+.contribs-length-4 div {
+  background-color: #40B678;
+}
+
+.contribs-length-5 div {
+  background-color: #26A269;
+}
+
 .browse-summary {
   font-variant: lining-nums;
 }
diff --git a/fietsboek/static/theme.css.map b/fietsboek/static/theme.css.map
index 3ddb9bc..acade8d 100644
--- a/fietsboek/static/theme.css.map
+++ b/fietsboek/static/theme.css.map
@@ -1 +1 @@
-{"version":3,"sourceRoot":"","sources":["../../asset-sources/theme.scss"],"names":[],"mappings":"AAAA;EACE;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;AAEA;EACE;EACA;EACA;;;AAIJ;EACE;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;;;AAGF;EACE;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EAqCE;EACA;EACA;EACA;EACA;EACA;;AAzCA;EACE;EACA;EACA;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;AAGF;EACE;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;;;AAWJ;EACI;;;AAGJ;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;;AAEA;EACE;EACA;;AAGF;EACE;;;AAIJ;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;EACA;EACA;EACA;;;AAGF;EACE;;;AAEF;EACE;EACA;;;AAEF;EACE;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;AAGF;EACE;EACA;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;AAIJ;EACE;;AAEF;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;EACA;;AACA;EACE;;AAIJ;EACE;EACA;;;AAIJ;EACE;;;AAGF;AACA;EACE;;;AAGF;EACE;EACA;;AAEA;EAJF;IAKI,eACE;;;AAIJ;EACE;;AAGF;EACE;;AAEA;EAHF;IAII;;;AAGF;EACE;EACA;;AAIJ;EACE;EACA;;;AAIJ;EACE;;;AAGF;AACA;EACE;EACA;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE","file":"theme.css"}
\ No newline at end of file
+{"version":3,"sourceRoot":"","sources":["../../asset-sources/theme.scss"],"names":[],"mappings":"AAAA;EACE;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;AAEA;EACE;EACA;EACA;;;AAIJ;EACE;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;;;AAGF;EACE;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAIA;EACE;EACA;EACA;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;EACA;;AAGF;EACE;EACA;;AAGF;EACE;EACA;EACA;EACA;EACA;EACA;;AAlCJ;EAqCE;EACA;EACA;EACA;EACA;EACA;;;AAGF;EACI;;;AAGJ;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;;AAEA;EACE;EACA;;AAGF;EACE;;;AAIJ;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;EACA;EACA;;;AAGF;EACE;EACA;;;AAGF;EACE;EACA;EACA;EACA;;;AAGF;EACE;;;AAEF;EACE;EACA;;;AAEF;EACE;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;AAGF;EACE;EACA;;AAEA;EACE;EACA;;AAGF;EACE;EACA;;AAIJ;EACE;;AAEF;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;;AACA;EACE;;AAGJ;EACE;EACA;;AACA;EACE;;AAIJ;EACE;EACA;;;AAKF;EACE;EACA;EAEA;EACA;;;AAIJ;EACE;;;AAGF;EACE;;;AAEF;EACE;;;AAEF;EACE;;;AAEF;EACE;;;AAEF;EACE;;;AAEF;EACE;;;AAGF;EACE;;;AAGF;AACA;EACE;;;AAGF;EACE;EACA;;AAEA;EAJF;IAKI,eACE;;;AAIJ;EACE;;AAGF;EACE;;AAEA;EAHF;IAII;;;AAGF;EACE;EACA;;AAIJ;EACE;EACA;;;AAIJ;EACE;;;AAGF;AACA;EACE;EACA;EACA;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;EACA;;;AAGF;EACE;;;AAGF;EACE;;;AAGF;EACE","file":"theme.css"}
\ No newline at end of file
diff --git a/fietsboek/summaries.py b/fietsboek/summaries.py
index 0bee6ca..502e2f9 100644
--- a/fietsboek/summaries.py
+++ b/fietsboek/summaries.py
@@ -2,11 +2,18 @@
 
 import datetime
 from dataclasses import dataclass
-from typing import Optional
+from typing import Iterator, Optional
+
+from babel import Locale
+from babel.dates import format_date
+from pyramid.i18n import Localizer
+from pyramid.request import Request
 
 from . import util
 from .models.track import TrackWithMetadata
 
+ONE_WEEK = datetime.timedelta(days=7)
+
 
 class Summary:
     """A summary of a user's tracks.
@@ -294,4 +301,168 @@ class CumulativeStats:
         return util.round_to_seconds((self.moving_time + self.stopped_time) / self.count)
 
 
-__all__ = ["Summary", "YearSummary", "MonthSummary", "CumulativeStats"]
+class YearContributions:
+    """Github-contributions-tracker-like overview for tracks."""
+
+    def __init__(self, end_date: datetime.date):
+        self.end_date = end_date
+        self.start_date = end_date - 52 * ONE_WEEK
+        # Make sure the start of the range is on a Monday
+        self.start_date -= datetime.timedelta(days=end_date.weekday())
+        assert (self.start_date - self.end_date).days <= 53 * 7
+
+        self.tracks: dict[datetime.date, list[TrackWithMetadata]] = {}
+
+    def add(self, track: TrackWithMetadata):
+        """Adds a track to this overview.
+
+        :param track: The track to add.
+        """
+        if track.date is None:
+            return
+        date = track.date.date()
+        if self.start_date <= date <= self.end_date:
+            self.tracks.setdefault(date, []).append(track)
+
+    def rows(self) -> Iterator[Iterator[DayContributions]]:
+        """Returns the rows for the overview table.
+
+        Each row is a list of the cells. Seven rows will be returned, one for each weekday.
+
+        :return: An iterator over the rows to render.
+        """
+        for weekday in range(7):
+            row = []
+            day = self.start_date + datetime.timedelta(days=weekday)
+            while day <= self.end_date:
+                row.append(DayContributions(day, self.tracks.get(day, [])))
+                day += ONE_WEEK
+            yield iter(row)
+
+    def _rowheads(self, localizer: Localizer) -> Iterator[str | None]:
+        """Returns the row heads (i.e., weekday names) to be prepended to the rows.
+
+        :param localizer: The localizer to use.
+        :return: An iterator over the column headers.
+        """
+        loc = Locale.parse(localizer.locale_name)
+        days = loc.days["stand-alone"]["abbreviated"]
+        return iter(
+            [
+                days[0],
+                None,
+                None,
+                days[3],
+                None,
+                None,
+                days[6],
+            ]
+        )
+
+    def rows_with_heads(
+        self, localizer: Localizer
+    ) -> Iterator[tuple[str | None, Iterator[DayContributions]]]:
+        """Returns each row with its associated heading (weekday name).
+
+        :param localizer: The localizer to use.
+        :return: An iterator over (header, cells) pairs.
+        """
+        return zip(self._rowheads(localizer), self.rows())
+
+    def header_row(self, localizer: Localizer) -> Iterator[str | None]:
+        """Returns the header row.
+
+        Each string marks a month name (spanning three columns), and a ``None`` is an empty column.
+
+        :param localizer: The localizer to use.
+        :return: An iterator over the column headers.
+        """
+        locale = localizer.locale_name
+        day = self.start_date
+        while day <= self.end_date:
+            diq = day + datetime.timedelta(days=6)
+            if diq.day <= 7:
+                yield format_date(diq, "MMM", locale=locale)
+                day += 3 * ONE_WEEK
+            else:
+                yield None
+                day += ONE_WEEK
+
+
+class DayContributions:
+    """A single cell (representing one day) for the YearContributions."""
+
+    def __init__(self, day: datetime.date, tracks: list[TrackWithMetadata]):
+        self.day = day
+        self.tracks = tracks
+
+    def total_length(self) -> float:
+        """The total length of all tracks on this day, in meters."""
+        return sum(track.length for track in self.tracks)
+
+    def count(self) -> int:
+        """The number of tracks in this day."""
+        return len(self.tracks)
+
+    def cell_style(self) -> str:
+        """Returns the CSS style that should be applied to the cell.
+
+        :return: The CSS class.
+        """
+        length = self.total_length() / 1000
+        # Arbitrary cutoffs, should maybe be the same as for the calendar
+        if length == 0:
+            return "contribs-length-0"
+        if length <= 25:
+            return "contribs-length-1"
+        if length <= 50:
+            return "contribs-length-2"
+        if length <= 75:
+            return "contribs-length-3"
+        if length <= 100:
+            return "contribs-length-4"
+        return "contribs-length-5"
+
+    def tooltip(self, localizer: Localizer) -> str:
+        """Generates the tooltip for the cell, localized to the given language.
+
+        :param localizer: The localizer to use.
+        :return: The tooltip text.
+        """
+        formatted_date = format_date(self.day, locale=localizer.locale_name)
+        return localizer.pluralize(
+            "page.profile.contribution_card.tooltip",
+            "page.profile.contribution_card.tooltips",
+            self.count(),
+            mapping={
+                "count": self.count(),
+                "date": formatted_date,
+            },
+        )
+
+    def browse_url(self, request: Request) -> str:
+        """Returns a URL to the browse page with filters for this day applied.
+
+        :param request: The pyramid request.
+        :return: The URL.
+        """
+        datestring = self.day.strftime("%Y-%m-%d")
+        return request.route_url(
+            "browse",
+            _query={
+                "type[]": "ORGANIC",
+                "show-only[]": "user-tagged",
+                "min-date": datestring,
+                "max-date": datestring,
+            },
+        )
+
+
+__all__ = [
+    "Summary",
+    "YearSummary",
+    "MonthSummary",
+    "CumulativeStats",
+    "YearContributions",
+    "DayContributions",
+]
diff --git a/fietsboek/templates/profile_overview.jinja2 b/fietsboek/templates/profile_overview.jinja2
index eaa10c6..a088ba5 100644
--- a/fietsboek/templates/profile_overview.jinja2
+++ b/fietsboek/templates/profile_overview.jinja2
@@ -109,6 +109,56 @@
   </tr>
 </table>
 
+<h2>{{ _("page.profile.contribution_card.title") }}</h2>
+<div class="d-xl-flex justify-content-center" style="overflow: scroll;">
+  <table class="contributions">
+    <thead>
+      <tr>
+        <th></th>
+        {% for cell in year_contributions.header_row(request.localizer) %}
+        {% if cell is none %}
+        <th></th>
+        {% else %}
+        <th colspan="3" class="text-muted">{{ cell }}</th>
+        {% endif %}
+        {% endfor %}
+      </tr>
+    </thead>
+    <tbody>
+      {% for rowhead, row in year_contributions.rows_with_heads(request.localizer) %}
+      <tr>
+        <td class="text-muted contribs-rowhead">{{ rowhead | default("", true) }}</td>
+        {% for cell in row %}
+        <td class="contribs-cell {{ cell.cell_style() }}">
+          <a href="{{ cell.browse_url(request) }}">
+            <!-- Use a div because border-radius does not work on td -->
+            <div data-bs-toggle="tooltip" title="{{ cell.tooltip(request.localizer) }}"></div>
+          </a>
+        </td>
+        {% endfor %}
+      </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+</div>
+
+<div class="d-flex justify-content-end mb-3">
+  <table>
+    <tbody>
+      <tr>
+        <td>{{ _("page.profile.contribution_card.legend.less") }}</td>
+        <td class="contribs-cell contribs-length-0"><div></div></td>
+        <td class="contribs-cell contribs-length-1"><div></div></td>
+        <td class="contribs-cell contribs-length-2"><div></div></td>
+        <td class="contribs-cell contribs-length-3"><div></div></td>
+        <td class="contribs-cell contribs-length-4"><div></div></td>
+        <td class="contribs-cell contribs-length-5"><div></div></td>
+        <td>{{ _("page.profile.contribution_card.legend.more") }}</td>
+      </tr>
+    </tbody>
+  </table>
+</div>
+
 {% if total.longest_distance_track %}
 <h2>{{ _("page.profile.longest_distance_track") }}</h2>
 {{ render_track_card(total.longest_distance_track) }}
diff --git a/fietsboek/views/profile.py b/fietsboek/views/profile.py
index 6d671b9..4f9abca 100644
--- a/fietsboek/views/profile.py
+++ b/fietsboek/views/profile.py
@@ -16,7 +16,7 @@ from sqlalchemy.orm import aliased
 from .. import models, util
 from ..data import UserDataDir
 from ..models.track import TrackType, TrackWithMetadata
-from ..summaries import CumulativeStats, Summary
+from ..summaries import CumulativeStats, Summary, YearContributions
 
 # A well-made transparent tile is actually pretty small (only 116 bytes), which
 # is even smaller than our HTTP 404 page. So not only is it more efficient
@@ -49,6 +49,7 @@ LOGGER = logging.getLogger(__name__)
 def profile_data(request: Request) -> dict:
     """Retrieves the profile data for the given request."""
     total = CumulativeStats()
+    year_contribs = YearContributions(datetime.date.today())
 
     query = request.context.all_tracks_query()
     query = select(aliased(models.Track, query)).where(query.c.type == TrackType.ORGANIC)
@@ -56,6 +57,7 @@ def profile_data(request: Request) -> dict:
     for track in request.dbsession.execute(query).scalars():
         meta = TrackWithMetadata(track)
         total.add(meta)
+        year_contribs.add(meta)
 
     total.moving_time = util.round_to_seconds(total.moving_time)
     total.stopped_time = util.round_to_seconds(total.stopped_time)
@@ -79,6 +81,7 @@ def profile_data(request: Request) -> dict:
         "mps_to_kph": util.mps_to_kph,
         "heatmap_url": heatmap_url,
         "tilehunt_url": tilehunt_url,
+        "year_contributions": year_contribs,
     }