Two monthly modes, no silent clamping
Choose last day of month, or pin an explicit day number. With an explicit day like the 31st, months that lack it are skipped openly and the preview tells you before activation. Nothing quietly slides from the 31st to the 30th unless you asked for last day semantics.
- Exact day number plus local time, or last-day mode
- Upcoming twelve months resolvable in the preview
- Timezone-stored intent so the local meaning survives DST
- Ideal for billing reminders, digests, and compliance notes