CRN0

AST to JST cron converter

JST is currently 13 hours ahead of AST. Convert JST to AST

UTC-4
UTC+9
0 22 * * *

At 22:00 every day in Tokyo.

Show timeline and next runs
Halifax
00061218
00061218
Tokyo
Each amber mark is a run time. The top strip shows Halifax local time and the bottom strip shows Tokyo local time, lined up so the same moment sits on the same vertical line. Shaded areas are night hours.

Same moment as “at 09:00 every day” in Halifax.

HalifaxTokyo

Examples

ASTJST
0 9 * * *
0 22 * * *
0 9 * * 1-5
0 22 * * 1-5
*/15 * * * *
*/15 * * * *
0 0 * * *
0 13 * * *
30 2 * * 0
30 15 * * 0
0 0 1 * *
0 13 1 * *
0 */6 * * *
0 1-23/6 * * *
0 17 * * 5
0 6 * * 6
Every hour of the day
0 0 * * *0 13 * * *
0 1 * * *0 14 * * *
0 2 * * *0 15 * * *
0 3 * * *0 16 * * *
0 4 * * *0 17 * * *
0 5 * * *0 18 * * *
0 6 * * *0 19 * * *
0 7 * * *0 20 * * *
0 8 * * *0 21 * * *
0 9 * * *0 22 * * *
0 10 * * *0 23 * * *
0 11 * * *0 0 * * *next day
0 12 * * *0 1 * * *next day
0 13 * * *0 2 * * *next day
0 14 * * *0 3 * * *next day
0 15 * * *0 4 * * *next day
0 16 * * *0 5 * * *next day
0 17 * * *0 6 * * *next day
0 18 * * *0 7 * * *next day
0 19 * * *0 8 * * *next day
0 20 * * *0 9 * * *next day
0 21 * * *0 10 * * *next day
0 22 * * *0 11 * * *next day
0 23 * * *0 12 * * *next day

Questions

How do I convert a cron expression from AST to JST?

JST is currently 13 hours ahead of AST. Add 13 hours to the hour field, and shift the day-of-week if the time crosses midnight. For example, 0 9 * * 1-5 (weekdays at 09:00 AST) becomes 0 22 * * 1-5 in JST.

What is the time difference between AST and JST?

Atlantic Time is UTC-4 / UTC-3 and Japan Standard Time is UTC+9. Right now jST is currently 13 hours ahead of AST.

Does daylight saving time affect AST to JST cron conversion?

AST observes daylight saving time, so the difference between AST (UTC-4 / UTC-3) and JST (UTC+9) changes during the year. Re-check your converted cron after each DST change.

What is midnight AST in JST cron?

Midnight in AST (0 0 * * *) is 0 13 * * * in JST.

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