Five Things You Need to Know Today: March 14

1. Jared from Subway is in town. Subway spokesman Jared Fogle to help combat childhood obesity. Mayor Setti Warren will join Fogle for the announcement, which will take place at 10 a.m. at the . 

2. Blood drive. The will host a blood drive today from 9 a.m. to 3 p.m.

3.14159...For all the nerds out there, Happy Pi Day! 

4. Jean swap. will kick off its today at its stores in Newton and Wellesley. The swap, which benefits Rosie's Place, encourages men and women to donate gently worn denim to the National Jean Company Stores and in return, the store will give a 15-30 percent discount for new denim. The jean swap will run until this Sunday, March 18. 

5. NewTV annual meeting. NewTV at 7 p.m. in the studios. There will be an annual report, refreshments and three nominees will be elected to the NewTV Board of Directors.