* God said that on the tenth day of that month, the Israelites were to start getting ready to follow certain steps on Nisan 14. That day began at sunset because the Hebrew days ran from sunset to sunset.
وَقَدْ بَدَأَ هٰذَا ٱلْيَوْمُ عِنْدَ غُرُوبِ ٱلشَّمْسِ لِأَنَّ ٱلْأَيَّامَ ٱلْعِبْرَانِيَّةَ كَانَتْ تَبْدَأُ مِنْ غُرُوبِ ٱلشَّمْسِ وَتَنْتَهِي عِنْدَ غُرُوبِهَا فِي ٱلْيَوْمِ ٱلتَّالِي .‏