Perpetual Calendar

Perpetual Calendar is an offline calendar and simple event planner. Add events with date & time, see countdowns, and keep your data safe with backup. Features • Offline—no sign-in required • Add, edit, delete events with notes and optional image • Countdown timer and “time’s up” alert • Month calendar with dots for days that have events • “All events” list with search and advanced filters (title, note, date, has image) • Quick filters: Today, Weekend, This week, Good day, Due in < 24h • Sort by: Nearest, Farthest, Name • Backup & restore: JSON/CSV + ZIP images; share file • PIN lock in Settings • Multi-language (EN/ZH/FR/ID/JA/KO/RU/ES/TH/VI) • Google banner ad at the bottom