Payas Web Kit · Calendar

Payas Days

A fully client-side web calendar with Month, Week, Day, and Agenda views. Events stored in IndexedDB. Export to ICS (Google Calendar compatible) or Markdown. No server needed.

Open Calendar Docs

id::payas-days · stable

KitPayas Web Kit

PlatformBrowser · Web

ViewsMonth · Week · Day · Agenda

StorageIndexedDB · persistent

ExportICS · Markdown bundle

RecurrenceRRULE · Daily to Yearly

LicenseMIT

Open App

Views

Month · Week · Day · Agenda

Storage

IndexedDB

Persistent · no server

Event colours

Blue teal green yellow…

ICS export

RFC 5545

Google · Outlook · Apple

features

What Payas Days does

Four calendar views

Month grid with up to 3 chips per cell. Week view with 24-hour time grid and a now-line. Day view and 30-day Agenda view — all with live navigation.

ICS import & export

Export all events as payas-days.ics (RFC 5545 — compatible with Google Calendar, Outlook, Apple Calendar). Import from any .ics file.

Recurring events

RRULE support — daily, weekly (with specific days), monthly, yearly. Events expand on the fly per view range. Up to 500 occurrences per query.

Reminders & conflict detection

Web Notifications API reminders fired at configurable minute offsets. Conflict detection flags overlapping timed events before saving.

Search across all events

Inline search bar across title, description, location, and label — case-insensitive, debounced 200 ms. Click a result to jump to Day view and open the event popover.

Rich event fields

Title, all-day toggle, start/end, description (Markdown), location, timezone, colour (10 options), label, recurrence, reminders, attendees, and attachments.

technical · details

Technical details

Entry point	`payas-days/index.html` — multi-file static app
Stack	HTML5 · CSS3 · Vanilla JavaScript ES2022 (module pattern, no bundler)
Dependencies	Bootstrap 5.3 · Font Awesome 6.5 · Google Fonts
Storage	IndexedDB (`payas-days` db) — events store + settings store. No localStorage for data.
ICS standard	RFC 5545 — VALARM reminders, ATTENDEE, RRULE, line folding at 75 chars
Markdown format	YAML front-matter per event — id, title, start, end, allDay, timezone, location, color, label, recurrence, reminders, attendees, attachments
Recurrence	RRULE parser supporting FREQ, INTERVAL, COUNT, UNTIL, BYDAY. Max 500 occurrences per range query.
Keyboard shortcuts	← → navigate · T today · / search · Escape close search
Developer	Saman Wijesinghe
License	MIT