Highlight today in the calendar.

ansible/roles/sway/files/waybar_config.json

@@ -20,7 +20,7 @@
     "spacing": 10
   },
   "custom/clock": {
-    "exec": "waybar_custom_clock 'America/New_York'",
+    "exec": "waybar_custom_clock",
     "return-type": "json",
     "restart-interval": 30
   }

ansible/roles/sway/files/waybar_custom_clock.py

@@ -40,7 +40,7 @@ class Update:
 
 
 @lru_cache(maxsize=1)
-def make_calendar(today: datetime.date, tz: datetime.tzinfo):
+def make_calendar(today: datetime.date):
     width: Final[int] = 20
     start_of_month = today.replace(day=1)
     month_header = today.strftime("%B %Y")
@@ -62,7 +62,11 @@ def make_calendar(today: datetime.date, tz: datetime.tzinfo):
             output += "\n"
         else:
             output += " "
+        if print_day == today:
+            output += '<span foreground="blue">'
         output += f"{print_day.day: >2}"
+        if print_day == today:
+            output += "</span>"
         print_day += datetime.timedelta(days=1)
     return output
 
@@ -83,10 +87,14 @@ def main():
 
         now = datetime.datetime.now(tz=tz)
         text = now.strftime("%Y-%m-%d %H:%M")
-        tooltip = make_calendar(now.date(), tz)
+        tooltip = make_calendar(now.date())
 
         out = Update(
-            text=text, alt="foo", tooltip=tooltip, css_class=["foo"], percentage="100"
+            text=text,
+            alt="foo",
+            tooltip=f"<tt>{tooltip}</tt>",
+            css_class=["foo"],
+            percentage="100",
         )
 
         print(out.dump(), flush=True)