CRN0

AST to KST cron converter

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

UTC-4
UTC+9
0 22 * * *

At 22:00 every day in Seoul.

Show timeline and next runs
Halifax
00061218
00061218
Seoul
Each amber mark is a run time. The top strip shows Halifax local time and the bottom strip shows Seoul 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.

HalifaxSeoul

Examples

ASTKST
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 KST?

KST 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 KST.

What is the time difference between AST and KST?

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

Does daylight saving time affect AST to KST cron conversion?

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

What is midnight AST in KST cron?

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

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