BioStar 2 does not support daylight saving time in versions below 2.6.
If you're using a version below BioStar 2.6 and would prefer not to upgrade your server, use the option below as a temporary solution.
1. Sync the devices
This should sync the device time with the changed server's time.
If that doesn't resolve the issue,
2. Stop and restart BioStar 2 service.
This should apply the server PC's time to the BioStar server time.
Sync the devices again in BioStar 2 to confirm that the server's time is applied.
If that doesn't resolve the issue try the following,
3. Change the timezone on preference and device.
Go to Setting > Preference and change the timezone to -1 or +1 based on start or end of daylight saving time.
Apply the same for the device