Hello Daniel
You can achieve this with the following commands:
ASA1(config)# clock timezone PST
By default, daylight savings time is automatically adjusted with a recurring date range is from 2:00 AM on the second Sunday in March to 2:00 AM on the first Sunday in November. Some regions of the world change ad different times. You can change when daylight savings time will begin and when it will end using a command similar to the following:
ASA1(config)# clock summer-time PDT 1 April 2022 2:00 60
This will cause daylight savings time to begin on April 1st 2022, at 2 AM, and the adjustment will be a change of 60 minutes.
The above describes the commands for an ASA version 9.13. For Firepower appliances, the commands are slightly different. More on how these can be changed for both Firepower and ASA devices, take a look at the following documentation:
I hope this has been helpful!
Laz