Time stamps
The twping RPC call supports ISO8601-formatted time stamps, which differ slightly from those that are supported by the twping CLI command. The time-of-first and time-of-last time stamps that are supported by the twping RPC call include time zone offsets. These offsets are not included by the twping CLI command.
first: 2016-01-08T13:51:41.855
last: 2016-01-08T13:51:52.016
<time-of-first>2016-01-08T13:51:41.855+00:00</time-of-first>
<time-of-last>2016-01-08T13:51:52.016+00:00</time-of-last>