Just so you have the answer available,
should you ever need it.
Jersey cows are milked morning and evening when in a dairy environment.
When with a calf that has not weaned, those mothers are milked once a day.
This occurs usually at the evening milking.
There is the option of boarding the calf and mother separate from the herd and not milking her at all until the calf is weaned, but usually that reduces the milk production of the mother after the calf is weaned.
I'm glad the calf is back, where did it go?