A lot of humans don't run on numbers and thus don't remember all the numbers that describe a certain temporal value all that well. This includes, years, months,

A lot of humans don't run on numbers and thus don't remember all the numbers that describe a certain temporal value all that well. This includes, years, months, dates, week numbers, hours, minutes, seconds, and timezone offsets. Luckily, the devices we have around us are much better at number-things, so it was probably deemed helpful to have those devices that are (supposedly) good at numbers display them to us so when we forget, we have a reference that can help us remember.