en_tn/exo/12/18.md

twilight

This refers to the time of evening after the sun has set but while there is still some light. See how you translated this in Exodus 12:6.

the fourteenth day in the first month

This is the first month of the Hebrew calendar. The fourteenth day is near the beginning of April on Western calendars. (See: rc://en/ta/man/translate/translate-hebrewmonths and rc://en/ta/man/translate/translate-ordinal)

the twenty-first day of the month

"the twenty-first day of the first month." This is near the middle of April on Western calendars. (See: rc://en/ta/man/translate/translate-hebrewmonths and rc://en/ta/man/translate/translate-ordinal and rc://en/ta/man/translate/figs-ellipsis)