I realized since very young that the perception of time is illusions because it is just numbers on a clock that loop itself as to give you a sense of time mechanically indicated to give you that is the actually time of that day in hours as the clock reports it as so.
Which to me isn't as accurate because time zones can change time in different fractions in which ever way the considered time is programmed. Meaning that the calendars used is under control whoever decides the time of events!
Plus what if all clocks stopped working one day out of system error? Who can tell the time then without Sun Glaring... It's not easy.
See how perceptive that is? It gets deeper than that but it's not going to be easy to explain.
If I were rich I would band out a diamond studded sundial pocket watch size because the time would always be accurate by Sun Light level.
It would shine harder with the diamonds plus you won't need batteries or readjustment to your dial.