CRN0

IST to AST cron converter

AST is currently 9 hours 30 minutes behind IST. Convert AST to IST

UTC+5:30
UTC-4
30 23 * * *

At 23:30 every day in Halifax.

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

MumbaiHalifax

Examples

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

Questions

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

AST is currently 9 hours 30 minutes behind IST. Subtract 9 hours 30 minutes to the hour and minute field, and shift the day-of-week if the time crosses midnight. For example, 0 9 * * 1-5 (weekdays at 09:00 IST) becomes 30 23 * * 0-4 in AST.

What is the time difference between IST and AST?

India Standard Time is UTC+5:30 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 9 hours 30 minutes behind IST.

Does daylight saving time affect IST to AST cron conversion?

AST observes daylight saving time, so the difference between IST (UTC+5:30) and AST (UTC-4 / UTC-3) changes during the year. Re-check your converted cron after each DST change.

What is midnight IST in AST cron?

Midnight in IST (0 0 * * *) is 30 14 * * * in AST, on the previous day.

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