"Wed, 28 Jan 1970 04:34:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
04:34:20
General datetime
1970-01-28 04:34:20Z
For Database
1970-01-28 04:34:20
For HTTP1.1
Wed, 28 Jan 1970 04:34:20 GMT