All your examples in #2 are correct. The verb forms used in the first and third sentences refer to a future time, while the second refers to a past. An example in the present perfect is "I have been attending an interesting lecture series this month." We generally do not use this day in the same manner, preferring today. We can say "July 4, 1776 is an important day in US history because on this day the Declaration of Independence was signed."