I was advised that I have to confirm my flight "48 hours before the departure". What does that mean exactly? "48 hours before the departure" is just a "point" of time, not a period. I don't think it means I have to do confirm the flight 'exactly' 48 hours before the departure because doing so almost impossible.
The possibilities are
- Before '48 hours before the departure'
- After '48 hours before the departure'
- Around '48 hours before the departure'
I'm really confused.