I’m being thick-help please

[Rememberthewhassupphase]

Changing internet providers and currently using a internet card for internet in the house at home, with a router.
I bought a card that was for 8 days use, I put it in around 6.30 last Thursday evening. When will it run out, tomorrow at 6.30 or Friday at 6.30?

Should be Friday

That’s what I originally thought, but was questioning it, god knows why 🤷🏻‍♀️

Friday

I disagree. Thursday is the 8th day so it should run out tomorrow evening.

Actually I am wrong - ignore me!

How?

Day 1: Thursday 6.30 to Friday 6.30
Day 2: Friday 6.30 to Saturday 6.30
Day 3: Saturday 6.30 to Sunday 6.30
Day 4: Sunday 6.30 to Monday 6.30
Day 5: Monday 6.30 to Tuesday 6.30
Day 6: Tuesday 6.30 to Wednesday 6.30
Day 7: Wednesday 6.30 to Thursday 6.30
Day 8: Thursday 6.30 to Friday 6.30

Well it depends whether it's for eight calendar days once activated, regardless of the starting time, or for 192 hours precisely.

Presuming it's the latter, it will expire on Friday evening.