Date Change Portuguese Perpetual

I have a question about the date change of the Portuguese Perpetual Calendar 5023-06:

When does the date normally change?? My watch changed on 00:16! Is that normal? The watch is about 2 years old.

Best Regards and thank you for your anwsers!

To me, a deviation of 16 minutes is quite acceptable. Mine does it a bit better, about 5 minutes after midnight.

Kind regards,
Paul

Sorry guys, i was wrong. I was just irritated by a "clicking-sound" at 00:16. the date actually changed 00:03 but i didn't see that and thougt it changed when i heard that "click". To be sure I changed it manual to the next day, all functions changed exactlty ca. 00:02/03 like it should be. But at ca 00:15 that clicking sound. I guess this is normal...

The click you hear may be the moon change. You can see that too.

Kind regards,
Paul

Yes the moophase does also a sound but a different, Moonphase, Day, Date everything changed at 00:03, I just tested it a second time slowly by hand...and again this cklicking at 00:15...i think it is normal but we never gave it attention, tomorrow i will compare with the 3750...