CRN0

KST to AST cron converter

AST is currently 13 hours behind KST. Convert AST to KST

UTC+9
UTC-4
0 20 * * *

At 20:00 every day in Halifax.

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

SeoulHalifax

Examples

KSTAST
0 9 * * *
0 20 * * *
0 9 * * 1-5
0 20 * * 0-4
*/15 * * * *
*/15 * * * *
0 0 * * *
0 11 * * *
30 2 * * 0
30 13 * * 6
0 0 1 * *
0 11 31 * *
0 */6 * * *
0 5-23/6 * * *
0 17 * * 5
0 4 * * 5
Every hour of the day
0 0 * * *0 11 * * *day before
0 1 * * *0 12 * * *day before
0 2 * * *0 13 * * *day before
0 3 * * *0 14 * * *day before
0 4 * * *0 15 * * *day before
0 5 * * *0 16 * * *day before
0 6 * * *0 17 * * *day before
0 7 * * *0 18 * * *day before
0 8 * * *0 19 * * *day before
0 9 * * *0 20 * * *day before
0 10 * * *0 21 * * *day before
0 11 * * *0 22 * * *day before
0 12 * * *0 23 * * *day before
0 13 * * *0 0 * * *
0 14 * * *0 1 * * *
0 15 * * *0 2 * * *
0 16 * * *0 3 * * *
0 17 * * *0 4 * * *
0 18 * * *0 5 * * *
0 19 * * *0 6 * * *
0 20 * * *0 7 * * *
0 21 * * *0 8 * * *
0 22 * * *0 9 * * *
0 23 * * *0 10 * * *

Questions

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

AST is currently 13 hours behind KST. Subtract 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 KST) becomes 0 20 * * 0-4 in AST.

What is the time difference between KST and AST?

Korea Standard Time is UTC+9 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 13 hours behind KST.

Does daylight saving time affect KST to AST cron conversion?

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

What is midnight KST in AST cron?

Midnight in KST (0 0 * * *) is 0 11 * * * in AST, on the previous day.

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