Top VIP Monthly Questions

When was last VIP monthly? And what dates are VIP monthly calculated? Is it the last 30 days from when they drop it? Or is it the first day of the month to the last day?

Or is it right after the previous VIP link drops that they start counting?

I'm asking because on Dec 30, 31st, and Jan 1st were my biggest days so far. And they add up to 500k wagered when I check statistics.

But when I check the "New Year 1m Race" leaderboard, it says I only wagered 178k, which is wayyyy to low to be considered for VIP, but 500k isn't, so I would really like to know.

Example, if last top VIP was dropped morning Dec 30th, and right after I manage to get huge wager amount on Dec 30th evening, and 31st. Will it count to my TOP player VIP? Or ONLY everything after Jan 1st??