"Wed, 07 Jan 1970 12:32:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
12:32:20
General datetime
1970-01-07 12:32:20Z
For Database
1970-01-07 12:32:20
For HTTP1.1
Wed, 07 Jan 1970 12:32:20 GMT