"Thu, 01 Jan 1970 12:26:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
12:26:21
General datetime
1970-01-01 12:26:21Z
For Database
1970-01-01 12:26:21
For HTTP1.1
Thu, 01 Jan 1970 12:26:21 GMT