Unusual May Holidays to Celebrate with Your Kids

I've included well known (not so unusual) holidays in this list as well.

1st -May Day, Loyalty Day, Mother Goose Day, Space Day (first Thurs.), Save the Rhino Day
2nd -Baby day, brothers and sisters day, International Tuba Day (first Friday), National Truffles Day
3rd -Lumpy Rug Day, National Raspberry Tart Day
4th -Bird Day, National Candied Orange Peel Day, Respect for Chickens Day
5th -Cinco de Mayo, National Hoagie Day, Oyster Day, Join Hands Day
6th -Beverage Day, National Teachers Day, National Nurses Day, No Diet Day
7th -National Tourism Day
8th -Iris Day, No Socks Day, Have a Coke Day, World Red Cross Day
9th -Lost Sock Memorial Day, National Butterscotch Brownie Day
10th -Birth Mother's Day, Clean Your Room Day, International Migratory Bird Day
11th -Eat What You Want Day, Twilight Zone Day
12th -Astronomy Day, International Nurses Day,
13th -Frog Jumping Day, Leprechaun Day
14th -Dance Like a Chicken Day
15th -Police Officer's Memorial Day, National Chocolate Chip Day, Flip Your Matress Day, Hug Your Cat Day
16th -Love a Tree Day, National Sea Monkey Day, Wear Purple for Peace Day
17th -Pack Rat Day, Armed Forces Day (third Sat of month)
18th -International Museum Day, No Dirty Dishes Day, Visit Your Relatives Day
19th -Band-aid Day, National Devil's Food Cake Day
20th -Be a Millionaire Day, Pick Strawberries Day, Weights & Measures Day
21st -National Memo Day
22nd -Buy a Musical Instrument Day, National Vanilla Pudding Day
23rd -Lucky Penny Day, Body Painting Day, National Taffy Day, World Turtle Day
24th -Tiara Day, Night Baseball Day
25th -Tap Dance Day
26th -Cherry Dessert Day
27th -Sun Screen Day
28th -Amnesty International Day, National Hamburger Day, Kite Flying Day, Whale Day
29th -Paper Clip Day
30th -Water a Flower Day
31st -National Macaroon Day, Save Your Hearing Day, World No Tobacco Day

Also...
May is Date your mate month, National Barbecue month, National Salad Month and National Hamburger Month