ICAO standard is 0000 UTC with some local exceptions e.g. USA 0901 UTC.
Our company procedure is to depart with the current FMS database and switch the cycle of our charting application at the appropriate time which is then considered as master for the remainder of the flight.
Australia (Y)
the day before AIRAC date at 1600 UTC
Canada (C)
0901 UTC
China (Z) (without VH and VM)
the day before AIRAC date at 1600 UTC
Japan (RJ)
the day before AIRAC date at 1500 UTC
Korea, Republic of (RK)
the day before AIRAC date at 1600 UTC
New Zealand (NZ)
the day before AIRAC date at 1200‡ UTC
Pacific AIP (without Cook Islands (NC), Samoa (NS),
the day before AIRAC date at 1200 UTC
Tonga (NF), Niue (NI), Fiji Islands (NF))
Samoa (NS)
the day before AIRAC date at 1100 UTC
Tonga (NF)
the day before AIRAC date at 1100 UTC
United States (K)
0901 UTC
(incl. Alaska (PA), American Samoa (NS), Guam (PG),
Hawaii (PH), Palau Island (PT), Puerto Rico (TJ),
Virgin Islands (TI))