get https://api.thethings.io/v2/utils/date/?format=
Retrieve the date of the server. The parameter format accepts two values: 'UTC' and 'unix_timestamp'.
curl -i -H "Accept: application/json" \
-H "Authorization: SESSION_TOKEN" \
-X GET "https://api.thethings.io/v2/utils/date/?format=UTC" -k