CRN0

HKT to AST cron converter

AST is currently 12 hours behind HKT. Convert AST to HKT

UTC+8
UTC-4
0 21 * * *

At 21:00 every day in Halifax.

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

Hong KongHalifax

Examples

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

Questions

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

AST is currently 12 hours behind HKT. Subtract 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 HKT) becomes 0 21 * * 0-4 in AST.

What is the time difference between HKT and AST?

Hong Kong Time is UTC+8 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 12 hours behind HKT.

Does daylight saving time affect HKT to AST cron conversion?

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

What is midnight HKT in AST cron?

Midnight in HKT (0 0 * * *) is 0 12 * * * in AST, on the previous day.

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