CRN0

HST to AST cron converter

AST is currently 6 hours ahead of HST. Convert AST to HST

UTC-10
UTC-4
0 15 * * *

At 15:00 every day in Halifax.

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

HonoluluHalifax

Examples

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

Questions

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

AST is currently 6 hours ahead of HST. Add 6 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 HST) becomes 0 15 * * 1-5 in AST.

What is the time difference between HST and AST?

Hawaii Time is UTC-10 and Atlantic Time is UTC-4 / UTC-3. Right now aST is currently 6 hours ahead of HST.

Does daylight saving time affect HST to AST cron conversion?

AST observes daylight saving time, so the difference between HST (UTC-10) and AST (UTC-4 / UTC-3) changes during the year. Re-check your converted cron after each DST change.

What is midnight HST in AST cron?

Midnight in HST (0 0 * * *) is 0 6 * * * in AST.

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