On 2019-06-26 09:22, Stephen Colebourne asked:
The Tokyo rule now includes the value 25:00 in the AT column. Can someone confirm the exact meaning of the 25:00? Is it
a) an extended local time-of-day b) the actual duration from midnight at the start of day
While similar, there would be a difference between the two definitions if there was a second DST gap/overlap earlier in the day.
eg. imagine the case where DST starts at 13:00 (with a gap to 14:00) and ends at 26:00. With (a) the AT column would hold 26:00, while with (b) the AT column would hold 25:00
I'm pretty sure it is (a), but wanted to double check before it gets baked into APIs
Stephen
Yes it is (a) because an AT value without suffix (or with suffix w) refers to the time in force just before the change in SAVE values. One could also write 25:00s for the AT value, referring to the time with SAVE value 00:00. HTH Michael Deckers.