We know that the Passover and the evening sacrifice were to take place "between the evenings":
Evening Sacrifice:
Exodus 29:39
One lamb you shall offer in the morning, and the other lamb you shall offer at twilight [beyn ha'arbayim, 'between the evenings'].
Exodus 29:41
And the other lamb you shall offer at twilight [beyn ha'arbayim, 'between the evenings']; and you shall offer with it the grain offering and the drink offering, as in the morning, for a sweet aroma, an offering made by fire to the Lord.
Numbers 28:4
The one lamb you shall offer in the morning, the other lamb you shall offer in the evening [beyn ha'arbayim, 'between the evenings'],
Numbers 28:8
The other lamb you shall offer in the evening [beyn ha'arbayim, 'between the evenings']; as the morning grain offering and its drink offering, you shall offer it as an offering made by fire, a sweet aroma to the Lord.
Passover Sacrifice:
Exodus 12:6
Now you shall keep it until the fourteenth day of the same month. Then the whole assembly of the congregation of Israel shall kill it at twilight [beyn ha'arbayim, 'between the evenings'].
Leviticus 23:5
On the fourteenth day of the first month at twilight [beyn ha'arbayim, 'between the evenings'] is the Lord's Passover.
Numbers 9:3
On the fourteenth day of this month, at twilight [beyn ha'arbayim, 'between the evenings'], you shall keep it at its appointed time. According to all its rites and ceremonies you shall keep it."
Numbers 9:5
And they kept the Passover on the fourteenth day of the first month, at twilight [beyn ha'arbayim, 'between the evenings'], in the Wilderness of Sinai; according to all that the Lord commanded Moses, so the children of Israel did.
Numbers 9:11
On the fourteenth day of the second month, at twilight [beyn ha'arbayim, 'between the evenings'], they may keep it. They shall eat it with unleavened bread and bitter herbs.
Also offered at the same time was the incense:
Exodus 30:8
And when Aaron lights the lamps at twilight [beyn ha'arbayim, 'between the evenings'], he shall burn incense on it [the golden alter], a perpetual incense before the Lord throughout your generations.
Incense is closely associated with prayer, even to the point of being used as a symbol for it (Psalms 141:2; Revelation 5:8; Luke 1:10).
The Passover sacrifice was at the same time as the evening daily sacrifice, the lighting of the temple lamps and the burning of the incense on the golden alter (Exodus 12:6, 29:39, 41, 30:8; Leviticus 23:5; Numbers 9:3, 5, 11, 28:4, 8). This time became known as "the hour of prayer" (Psalms 55:17, 141:2; Daniel 9:21; Luke 1:10); the evening hour of prayer is explicitly declared to be at the ninth hour (Acts 3:1, 10:30), the same time that Jesus was killed (Matthew 27:46-50; Mark 15:34-37; Luke 23:44-46) as "our Passover, sacrificed for us" (I Corinthians 5:7).
The ninth hour is said to be roughly at 3:00 pm (although, I have some lingering question about that).