Billing Cycle
  
If you’ve ever been slapped with a late fee on your credit card, that’s probably because you didn’t know the billing cycle. The billing cycle is the time between Time A and Time B, where you’ll be billed for anything bought in between those times.
Like the name implies, billing cycles are recurring, so that the end of your first billing cycle is the beginning of your second (and so on and so on and so on...).