What the Bible says about Twilight
(From Forerunner Commentary)

Genesis 15:4-5 Twilight is clearly past and now—with stars visible—it must be the dark part of Nisan 14. Both John 13:30 and I Corinthians 11:23 confirm the same general time in the events of Christ's final Passover. The daylight portion of the 14th is approaching. John W. Ritenbaugh Countdown to Pentecost 2001 Related Topics: Ben Ha Arbayim | Ben Har Arbayim | Christ's Final Passover | Nisan 14 | Passover | Passover, Timing of | Twilight

Deuteronomy 16:4 This sacrifice was made at the beginning of Nisan 15—at ba erev ["even" (KJV); "twilight" (NKJV)]—not at the beginning of the 14th. That makes it very certain that what is being discussed is the first day of Unleavened Bread. John W. Ritenbaugh The Night to be Much Observed Related Topics: First Day of Unleavened Bread | Night To Be Much Observed | Twilight