Jean-Luc Makiola
249606a358
Month, Week and Day each hand-rolled their title from a German-style template —
"$weekday, ${date.day}. $monthName ${date.year}" — so every language got a
trailing ordinal dot and day-before-month order, including ones that write the
month first. English read "Fri, 17. Jul 2026" where it should read
"Fri, Jul 17, 2026".
396a561 already fixed exactly this, but only for Agenda: it added
localizedDateFormatter and migrated the four agenda files, leaving Month, Week,
Day and MonthWidget on their originals. Day and Agenda therefore disagreed about
the same date. All four now route through formatCalendarTitle, so there is one
place left that decides how a title reads.
Two behaviour changes fall out of the reporter's point that the bar wastes space:
The year is dropped while you are in the current year. The title sits above a
grid that already says which year it is; the year's absence is itself the signal
that you are in the current one, and it reappears when you page out — the moment
it starts carrying information. Since a skeleton is a field list, this is just
appending "y", and the locale still places it.
The Week title names a month instead of a day range. "24. Jun – 31. Jun" restated
the day numbers printed in the column headers directly below, in the widest
string in the bar. Naming weekStart's month keeps a straddling week on the
outgoing month until it is fully gone — a week is seven contiguous days, so the
earlier month has a day in it exactly while weekStart is inside it. No straddle
conditional, and the title depends on nothing but weekStart, so it cannot drift
with the direction you paged in from.
currentLocale/localizedDateFormatter move to floret-kit's core-locale (neither is
calendar-specific); LocaleSupport.kt goes away and its 11 callers repoint.
MonthWidget keeps Locale.getDefault() — Glance has no LocalConfiguration and the
widget re-renders on a configuration change, matching AgendaWidget.
Does not touch the FAB stack the issue opens with: the buttons overlaying content
is intentional and matches Google Calendar.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Calendula
A modern Material 3 Expressive calendar for Android.
Reads, writes, and reminds — on top of the system calendar, with zero network access.
Calendula is named after the flower whose name — like the word calendar —
comes from the Latin kalendae, the first day of the month. It lives
entirely on top of Android's CalendarContract: any calendar synced to your
device (CalDAV via DAVx5, Google, local, WebCal subscriptions, …) simply
appears, and everything you create or edit syncs back the same way. No own
database, no sync stack reinvented.
✨ Features
Calendar
- Month, week, and day views with a one-tap view switcher
- Full event details — attendees and their responses, reminders, recurrence (humanized), availability, visibility, foreign time zones
- Per-calendar visibility toggle, grouped by account
Editing
- Create, edit, and delete events — including recurring events with scoped writes: only this event, this and all following, or the whole series
- Recurrence picker with one-tap presets and custom rules (interval, weekday toggles, end conditions); rules it can't express are preserved verbatim
- Conflict-safe saves: if an event changed elsewhere while you were editing, Calendula asks instead of silently overwriting
- Read-only calendars (WebCal, birthdays) are detected and respected
Reminders
- Event reminders delivered by Calendula itself as notifications — essential when it's your only calendar app, since Android delegates reminder delivery to calendar apps
- Tap a reminder to land on the event
Design & privacy
- Real Material 3 Expressive throughout — dynamic color (Android 12+), expressive motion and shapes, light/dark theme
- German and English UI, per-app language setting — and open to community translations
- Zero telemetry, zero analytics, no internet permission — your data never leaves the device
📦 Install
F-Droid (recommended)
Calendula is on the official F-Droid repository — just search for Calendula in any F-Droid client, or install it from f-droid.org.
Self-hosted repo (latest builds)
New versions are built, signed, and published to a self-hosted repository the moment each tag lands — usually a few days ahead of the official repo, which rebuilds on F-Droid's own schedule. Add it for the freshest builds:
-
In your F-Droid client, open Settings → Repositories → Add (or open the link below on your phone):
https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo?fingerprint=C2C0640402BF458FC0ED957AF0B37AA4C14022E72F89CE90B5965B458CF73425Repo:
https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo· fingerprint (SHA-256):C2C0 6404 02BF 458F C0ED 957A F0B3 7AA4 C140 22E7 2F89 CE90 B596 5B45 8CF7 3425 -
Refresh, search for Calendula, install.
Both channels share the same signing key, so you can switch between them without reinstalling. Or build from source — see below.
📚 Documentation
- Building from source — requirements and Gradle tasks
- Architecture — the layered design and key pipelines
- Roadmap — what's shipped and what's next
🌍 Translations
Calendula ships in German and English, and you're warmly invited to add your language. Translations are managed on a self-hosted Weblate:
No coding needed — register on the Weblate server, pick (or request) a language, and translate the strings in your browser. You can also reach this link in the app from the top of Settings → App language.
📜 License
MIT — Jean-Luc Makiola, 2026