http://www.lasvegasadvisor.com/greatdeals-slotpromotions.cfm
Downtown Grand Thru June: Mondays: Based on tier: White (2x),
Silver (3x) and Black (5x). 5x Weds for 60+ seniors.
I believe the Downtown Grand senior day is on Tuesdays and 50+ are now eligible instead of 60+. This is from their locals mailers and personal experience.