Some Holy Days of Obligation are no-brainers, like Christmas and Easter. However, some take a little more skill to remember. We bet there’s at least one day you think is a Holy Day of Obligation that isn’t. If you’re wondering whether today is a Holy Day of Obligation, we have the perfect solution for you! Refer to this handy flow chart. It does the thinking for you, so all you need to do is show up for Mass!