I'd suggest it's a matter of preference, though that preference may be dictated by others. The important thing is that you're clear, not ambiguous, and it also helps to be consistent, so try to do it the same way throughout. "3 planning" etc might need clarifying that '3' is March; but it may be clear in the context.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.