Custom render function for field value in template

[regesh]

How to make a hook that will customize value of field and output function result.
I want for field date (in templates) to display values like: yearstaday or today or in other ways 21 may(in my lang) 2021.
So for that i got function to parse Y-m-d to what i need. But i do not how to create hook. Thanks a lot!

[BillH]

If you want dates to output in other languages, I'd start here:

And perhaps also look at this:

If you want all dates from a particular field to be formatted the same on output, look at the Details tab for the data field.

To format dates on a template, use PW's $datetime->date() (see https://processwire.com/api/ref/wire-date-time/date/).

Or you could get the timestamp (the unformatted date) with $page->getUnformatted("date_field") and then use PHP's date functions – particularly strftime().