iso8601-timestamp package
Atom package to insert ISO 8601 compliant timestamps.
The package provides two functions.
cmd-shift-t (iso-datetime:local) prints a local timestamp like:
2015-08-29T11:57:03+02:00.
A context-menu option to insert the local time is provided.
cmd-shift-u (iso-datetime:utc) prints a UTC timestamp like:
2015-08-29T09:57:19Z.