x1 [hours, minutes, seconds] is the time/hour of state/event x2 on day x3 at location x4.
Also o'clock, time-of-day. (time units in x1 are specified as numbers separated by pi'e or are unit values massified with joi); See also cmavo list ti'u, cacra, cerni, detri, donri, djedi, junla, nicte, mentu, snidu, temci, vanci, dirba, mokca.