all in a day's work

[all in a day's work] or [all in the day's work] {adj. phr.}, {informal} Unpleasant or bad but to be expected; not harder than usual; not unusual.

Keeping ants away from a picnic lunch is all in the day's work.

When the car had a flat tire, Father said that it was all in a day's work.

Compare: PAR FOR THE COURSE, PUT UP WITH.