CRN0

AST to SGT cron converter

SGT is currently 12 hours ahead of AST. Convert SGT to AST

UTC-4
UTC+8
0 21 * * *

At 21:00 every day in Singapore.

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

HalifaxSingapore

Examples

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

Questions

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

SGT is currently 12 hours ahead of AST. Add 12 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 21 * * 1-5 in SGT.

What is the time difference between AST and SGT?

Atlantic Time is UTC-4 / UTC-3 and Singapore Time is UTC+8. Right now sGT is currently 12 hours ahead of AST.

Does daylight saving time affect AST to SGT cron conversion?

AST observes daylight saving time, so the difference between AST (UTC-4 / UTC-3) and SGT (UTC+8) changes during the year. Re-check your converted cron after each DST change.

What is midnight AST in SGT cron?

Midnight in AST (0 0 * * *) is 0 12 * * * in SGT.

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