grace period
US /ˈɡreɪs ˌpɪr.i.əd/
UK /ˈɡreɪs ˌpɪr.i.əd/

1.
a period of time after a payment is due, during which no penalties are incurred
:
•
The bill is due on the 1st, but there's a 10-day grace period.
•
Make sure to pay before the grace period ends to avoid late fees.
2.
a period allowed for an employee to adjust to a new job or for a new law to take effect before full enforcement
:
•
New employees often get a grace period to learn the ropes.
•
The new regulations have a six-month grace period before full enforcement begins.