Answer

If you took a sogan for 4 days on Tuesday at 6:37 pm, then it would get over on Saturday at 6:37 pm.

Explanation

A 4-day period means counting 96 hours from the time you started:

• Tuesday 6:37 pm → Wednesday 6:37 pm = 1 day
• Wednesday 6:37 pm → Thursday 6:37 pm = 2 days
• Thursday 6:37 pm → Friday 6:37 pm = 3 days
• Friday 6:37 pm → Saturday 6:37 pm = 4 days

Takeaway

Your 4-day sogan completes on Saturday at 6:37 pm.