Sorry for the delay. Didn't have any time at work to reply.

Thank you all for your interest and replies. I am trying to model whether or not a particular stock market is either open or closed. For example, the New York Stock exchange is open Monday - Friday but not Saturday or Sunday. The Tel Aviv Stock Exchange is open Sunday - Thursday but not Friday or Saturday. I thought that I could store whether or not the market was open as a boolean value and that led me to the two options I have above.