"Tue, 20 Jan 1970 07:45:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
07:45:51
General datetime
1970-01-20 07:45:51Z
For Database
1970-01-20 07:45:51
For HTTP1.1
Tue, 20 Jan 1970 07:45:51 GMT