CRN0

GMT to KST cron converter

KST is currently 9 hours ahead of GMT. Convert KST to GMT

UTC+0
UTC+9
0 18 * * *

At 18:00 every day in Seoul.

Show timeline and next runs
London
00061218
00061218
Seoul
Each amber mark is a run time. The top strip shows London 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 London.

LondonSeoul

Examples

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

Questions

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

KST is currently 9 hours ahead of GMT. Add 9 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 GMT) becomes 0 18 * * 1-5 in KST.

What is the time difference between GMT and KST?

Greenwich Mean Time (UK) is UTC+0 / UTC+1 and Korea Standard Time is UTC+9. Right now kST is currently 9 hours ahead of GMT.

Does daylight saving time affect GMT to KST cron conversion?

GMT observes daylight saving time, so the difference between GMT (UTC+0 / UTC+1) and KST (UTC+9) changes during the year. Re-check your converted cron after each DST change.

What is midnight GMT in KST cron?

Midnight in GMT (0 0 * * *) is 0 9 * * * in KST.

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