x1 (number) is the second/second notation of the minute, of event/state x2, in system x3.
cacra zei mentu zei tcika. As default, the number x1 is counted from the first second of the minute. See ti'u'i for BAI. ex.) li voxa cu metnidytcika lo nu samymri ti mi kei u'y ty cy (This was e-mailed to me at 46 seconds past the minute UTC.)