11/18-1/3

To calculate the number of days between November 18th and January 3rd, we need to count the number of days in November and December, and include January 3rd as well.

November has 30 days.
December has 31 days.
January 3rd is the 3rd day of the month.

So, the total number of days between November 18th and January 3rd is:

30 (days in November) + 31 (days in December) + 3 (days in January) = 64 days.