Test case for seconds-from-dateTime() function 7.10.3.a seconds-from-dateTime() function You should see 3.1536E7 or 31536000 for seconds-from-dateTime('1971-01-01T00:00:00Z'). seconds-from-dateTime('1971-01-01T00:00:00Z') : You should see 0.001 for seconds-from-dateTime('1970-01-01T00:00:00.001Z'). seconds-from-dateTime('1970-01-01T00:00:00.001Z') :