Format of timestamps in the history and bookmark files

In Netscape Navigator 1.x, the history file looks like this:
ftp://ftp.mcom.com      2876228634
http://hyperarchive.lcs.mit.edu/HyperArchive.html       2876286371
http://budman.cmdl.noaa.gov/RMWNTUG/rmwtnsw.map?255,188 2876305640
http://info.cern.ch/hypertext/WWW/Protocols/HTTP1.0/HTTP1.0-ID_53.html#4 2876309401
The first entry on each line represents a URL you visited, and the
second entry is a number representing the time you accessed it (given
in seconds since 00:00:00 GMT on January 1, 1970).  A separate line is
entered for each time you visited a URL, so you will have the same URL
listed several times in your file if you visited it often.
In Netscape Navigator 2.0, the history file is a database and therefore
isn't directly human-readable.
The bookmark file in both Netscape Navigator 1.x and 2.0 is
human-readable and uses timestamps in the same format as described
above.