Days 1 thru 15 are on page 6 of this thread. Starting on day 15, you use this formula: 880 + (# of days * 3)----except on the +XP days, when you get extra points.
This is a list of the +XP days (see the post by JimbeauC below to see what a +XP day looks like).
Day 10: 1030 XP = 880 + (10 * 15)
Day 20: 2060 XP = 880 + 880 + (20 * 15)
Day 50: 2260 XP = 880 + 880 + (50 * 10)
Day 75: 2510 XP = 880 + 880 + (75 * 10)
Day 100: 2760 XP = 880 + 880 + (100 * 10)
Day 150: 3260 XP = 880 + 880 + (150 * 10)
Day 350: 5260 XP = 880 + 880 + (350 * 10)
Day 365: 5410 XP = 880 + 880 + (365 * 10)
Day 450: 6260 XP = 880 + 880 + (450 * 10)
Day 650: 8260 XP = 880 + 880 + (650 * 10)
Day 900: 10760 XP = 880 + 880 + (900 * 10)
Day 2000: 21760 XP = 880 + 880 + (2000 * 10)
Keep 'em coming...