"Thu, 15 Jan 1970 21:46:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
21:46:06
General datetime
1970-01-15 21:46:06Z
For Database
1970-01-15 21:46:06
For HTTP1.1
Thu, 15 Jan 1970 21:46:06 GMT