"Thu, 15 Jan 1970 04:38:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
04:38:06
General datetime
1970-01-15 04:38:06Z
For Database
1970-01-15 04:38:06
For HTTP1.1
Thu, 15 Jan 1970 04:38:06 GMT