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Direct answer
The UseCOS Cron Schedule Calculator parses POSIX/V7 5-part cron expressions, validates step/range/wildcard syntax, provides an immediate plain-English translation of job schedules, and projects the exact next 10 execution timestamps with relative time offsets in both local time and UTC.
Standard 5-part POSIX/V7 cron syntax with real-time plain-English translation and upcoming execution schedules.
| # | Local Time | UTC Time | Relative Offset |
|---|---|---|---|
| 1 | Sat, 7 Nov 2026 16:00 | Sat, 7 Nov 2026 16:00 UTC | in 10 minutes |
| 2 | Sat, 7 Nov 2026 16:15 | Sat, 7 Nov 2026 16:15 UTC | in 25 minutes |
| 3 | Sat, 7 Nov 2026 16:30 | Sat, 7 Nov 2026 16:30 UTC | in 40 minutes |
| 4 | Sat, 7 Nov 2026 16:45 | Sat, 7 Nov 2026 16:45 UTC | in 55 minutes |
| 5 | Sat, 7 Nov 2026 17:00 | Sat, 7 Nov 2026 17:00 UTC | in 1h 10m |
| 6 | Sat, 7 Nov 2026 17:15 | Sat, 7 Nov 2026 17:15 UTC | in 1h 25m |
| 7 | Sat, 7 Nov 2026 17:30 | Sat, 7 Nov 2026 17:30 UTC | in 1h 40m |
| 8 | Sat, 7 Nov 2026 17:45 | Sat, 7 Nov 2026 17:45 UTC | in 1h 55m |
| 9 | Sat, 7 Nov 2026 18:00 | Sat, 7 Nov 2026 18:00 UTC | in 2h 10m |
| 10 | Sat, 7 Nov 2026 18:15 | Sat, 7 Nov 2026 18:15 UTC | in 2h 25m |
┌───────────── Minute (0 - 59) │ ┌─────────── Hour (0 - 23) │ │ ┌───────── Day of Month (1 - 31) │ │ │ ┌─────── Month (1 - 12 or JAN - DEC) │ │ │ │ ┌───── Day of Week (0 - 6 or SUN - SAT; 0 or 7 = Sunday) │ │ │ │ │ * * * * *
* = Any value (wildcard), = Value list separator (e.g. 1,5,10)- = Value range (e.g. 1-5 for Mon-Fri)/ = Step interval (e.g. */15 every 15 units)Standard scheduling patterns for background jobs, database backups, cache warming, and telemetry scraping.
| Workflow Intent | Cron Expression | Execution Cadence |
|---|---|---|
| Real-time queue polling | */5 * * * * | Every 5 minutes, 288 times daily |
| Hourly report rollups | 0 * * * * | At minute 0 of every hour |
| Nightly database backup | 0 2 * * * | Every day at 02:00 AM (off-peak) |
| Business day sync | 0 9 * * 1-5 | At 09:00 AM, Monday through Friday |
| Monthly billing cycle | 0 0 1 * * | On the 1st of every month at midnight |
POSIX Standard Syntax: The engine evaluates standard 5-part cron syntax adhering to IEEE Std 1003.1 (POSIX cron specification). When both the Day-of-Month (field 3) and Day-of-Week (field 5) fields are explicitly specified (not wildcards), the scheduler matches when either condition is met, reflecting standard V7 UNIX daemon behavior.
Timezone & Daylight Saving Adjustments: Execution dates are projected against both client browser local time and Universal Coordinated Time (UTC). Be aware that in production cron systems operating across daylight saving transitions (EDT/EST, PDT/PST), jobs scheduled between 02:00 and 03:00 may run twice or be skipped unless your server clock runs on UTC. We strongly recommend configuring servers to UTC.
Your cron expressions and scheduling parameters are computed directly inside your browser sandbox. No server requests, no tracking, and zero telemetry.