None.
logtstamp [on|off]logtstamp after [secs]logtstamp string [string]
This command controls logfile timestamp mechanism of screen. If timestamps
are turned “on”, screen adds a string containing the current time to the logfile after two minutes of inactivity. When output continues and more than
another two minutes have passed, a second timestamp is added to document the
restart of the output. You can change this timeout with the second form of the
command. The third form is used for customizing the time-stamp string (“–
%n:%t – time-stamp – %M/%d/%y %c:%s –\n” by default).
None yet.