Aside from being the midpoint of the week and of the month, Nov. 15 is also the date for several unofficial national holidays. 

Looking for a way to celebrate? You're in luck. Here are five, according to the online National Day Calendar:

1. Help keep the planet green.

Today is America Recycles Day. You can observe it by thinking twice before throwing that bottle away, by buying items made of recycled materials or by hauling that load of glass bottles to the nearest drop-off bin

2. Clean your refrigerator.

How many weeks old is that abandoned jug of milk? And what's that fuzzy green thing sitting in the back of the top rack? Today's National Clean Out Your Refrigerator Day, as good a time as any to take care of whatever moldy lifeforms may be lurking within the cool confines of your icebox.

3. Give to a good cause.

Tuesday is also National Philanthropy Day, a day dedicated to giving and volunteering. Take some time to contribute to a cause or an organization you believe in, or learn how to become more involved. 

4. Thank a school support employee.

If you know a school secretary, classroom aide, maintenance worker, bus drivers or cook, let them know you appreciate them. Today is National Education Support Professionals Day, a time to recognize the work they do to keep our schools running smoothly.

5. Have a cookie. 

If you're a fan of raisins, nuts and dates with a pinch of cinnamon, cloves, allspice and nutmeg, today's your lucky day. Nov. 15 is National Spicy Hermit Cookie Day. The holiday recognizes the chewy cookie, said to have originated in New England back in the late 1800s.

If you're more of the healthier type, it's also National Raisin Bran Cereal Day. Both are good with milk.