Do you remember the early automatic lawn sprinkler controllers based on rotating wheels--one for each hour of the day and one for each day of the week--like this "Lawn Genie" model?
I recall my father installing one, then replacing it--I think in the 1980s--with a digital model with a hard-to-read LCD display.
The fancier ones could use an optional rain gauge to have automatic rain delays.
Last summer I replaced the controller with a #Rachio 3, which just gets the weather forecast for my neighborhood from the internet, plans ahead, and sends a note to my smartphone saying it took care of the rain delay.
On a rainy day like today, it's the best thing I've bought in a long while...