The theme of Pesach Sheni1 (lit., the “second Passover”) is that it is never too late. It is always possible to put things right. Even if one was tamei (ritually impure), or one was far away, and even in a case of lachem — when this (impurity, etc.) was deliberate — nonetheless he can correct it.

HaYom Yom, entry for 14 Iyar