"Sat, 10 Jan 1970 23:38:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
23:38:31
General datetime
1970-01-10 23:38:31Z
For Database
1970-01-10 23:38:31
For HTTP1.1
Sat, 10 Jan 1970 23:38:31 GMT