크론 표현식 빌더

The app's interface is in Korean only. Paste a cron expression from a code review or an on-call page and check its next five run times, and why each date is included, before you copy it. For an expression that restricts both day of month and weekday, such as 0 9 1 * 1, the app calculates "the 1st OR Monday" and marks each run date with its reason: the day of month, the weekday, or both. Paste and edit fields - The clipboard is read only when you tap Paste. Your original text is kept as typed - Supported syntax: numeric five fields (minute 0-59, hour 0-23, day 1-31, month 1-12, weekday 0-7 where 0 and 7 are Sunday), *, comma lists, ascending ranges, */n and a-b/n steps - Not supported and never auto-converted: six or seven fields with seconds or years, month and weekday names, ? L W # H, macros like @daily, lines with a command. Errors keep your text, explain the reason and disable copy, share and save Day-of-month and weekday rule - Both restricted: OR. One of them is *: AND. The rule in use is shown next to the result, and both signals are drawn on one timeline Run time zone and your time - Choose this device, UTC, or search an IANA time zone. Each of the next five runs shows the run-zone time, your device time and the UTC offset at that moment - Nonexistent or repeated local times caused by DST are flagged. Actual DST behavior depends on your cron implementation Calculation states - Impossible dates (such as Feb 31), partial results that hit the search limit, and calculation failures are shown separately History, favorites, presets - Only valid expressions you save go into recent history (up to 20). Favorites, 16 presets and a cheat sheet can be loaded and edited On-device - IANA 2026e time zone data is bundled; no network is needed. No account, server, analytics, ads or purchases. Expressions and history stay on your device This is a calendar preview tool. It does not run jobs. Check your cron implementation and server settings for actual execution.