That problem can be caused my many problems. Where do you see the wrong time? on the ASA or on the syslog-server? Is your timezone set correctly? You should find a config similar to this in your config (with your local parameters):
clock timezone CEST 1
clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00
If the problem is on the syslog-server, then make sure that the ASA sends a timestamp:
And your syslog-server should also sync to ntp.
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ASA has sync with NTP source and showing corrent time when i issue show clock command. Below are for your reference.
ASA(config)#clock timezone GMT 5
ASA# sh clock
09:49:01.363 GMT Tue Nov 6 2012
I have configured emailing filter for certain syslog ids in ASA so when i get email alerts from ASA its showing wrong timing like ( if corrent time is 9:49am then it showing 2:49pm).
Seems to be a feature instead of a bug because it still does this in 9.14.1
clock timezone CST -6
clock summer-time CDT recurring
13:29:19.731 CDT Fri Jun 5 2020
Jun 05 2020 18:29:30: %ASA-4-106023:...
Jun 05 2020 18:29:30: %ASA-4-106023: ...
Jun 05 2020 18:29:30: %ASA-4-313005: ...