"Wed, 07 Jan 1970 07:51:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
07:51:20
General datetime
1970-01-07 07:51:20Z
For Database
1970-01-07 07:51:20
For HTTP1.1
Wed, 07 Jan 1970 07:51:20 GMT