Code
<usertime>1441099707112</usertime>
Result
1441099707112
Code
<usertime>2015-09-01T09:28:27+00:00</usertime>
Result
2015-09-01T09:28:27+00:00
Code
<usertime>2015-09-01T05:28:27-04:00</usertime>
Result
2015-09-01T05:28:27-04:00
Code
<usertime format="lll">1441099707112</usertime>
Result
1441099707112