In English, the days of the week have single-letter abbreviations (M, T, W, etc.) and three-letter abbreviations (Mon., Tue., Wed.). What are the standard ways to abbreviate the days of the week in Spanish?
I don't know if there's any official standard about this, but:
The single-letter abbreviations are:
L, M, X, J, V, S, D
Note that miércoles is usually written as X, so as not to confuse it with martes.
Regarding múltiple letter abbreviations, the usual way is two-letter abbreviations:
Lu, Ma, Mi, Ju, Vi, Sa, Do
In Costa Rica and Puerto Rico martes is abbreviated with a K for the same reason:
- L, K, M, J, V, S, D