Extract last lines of a logfile by time

Question

tail -n 100 myfile.log

gives my the last 100 lines of myfile.log.

Is there an existing tool that expects the first "column" of each line in a file as a timestamp and can give me the n last hours/days/...?

We can assume the lines in the file have ascending timestamps.

e.g.

tailtm -h 10 myfile.log

The tool should accept most common timestamp-formats of Linux logfiles.

Answer 1

As mentioned in the comments it is working with journalctl.

EDIT

journalctl -u sshd.service --since "2019-11-01 12:00:00"

I generate the sinde-timestamp for each call so I can have the timerange back as I need.

Thanks to mrc02_kr!