https://docs.lnav.org/en/latest/commands.html#adjust-log-tim...
That can be useful for doing minor alignments if clocks are slightly out of sync or doing timezone adjustments.
You can also adjust the time programmatically by updating the "time_offset" column in the "lnav_file" table:
https://docs.lnav.org/en/latest/sqltab.html#lnav-file
Sorry I don't have any examples written up to illustrate this at the moment...