Hippolytus's Easter table has ΠΑΘΟϹ ΧϹ (the passion of Christ) on a day on which the 14th of the Paschal moon falls on Friday, March 25th.
The computist of AD 243 says that the world was created on March 25th, and that Jesus was born on Wednesday, March 28th, the same day that the sun and moon were created. (De Pascha Computus 4). But he says the crucifixion was on Friday, April 9th. (De Pascha Computus 9).
In a list of vigils observed by the church of Tours, Gregory of Tours includes a vigil of "the Resurrection of Jesus Christ our Lord, 27 March, in St. Martin's Church". (History of the Franks 10.31). The resurrection on March 27 presupposes a crucifixion on March 25.
March 25 was chosen for the creation of the world because it was the old Roman date for the equinox. The computist of AD 243 is explicit that the world was created at the equinox:
[Scripture] openly shows that this is the first day and its following night, between which the Maker of all divided irreproachably and equally. (De Pascha Computus 3).
The doctrine of creation at the equinox was held also by those who considered the equinox to fall on some other date. A homily of AD 387, formerly attributed to John Chrysostom, states:
For it is fitting that creation should be before all future time, and that when day and night first came into being, their extent should be defined equally. Then afterward, from motion, inequality should arise.
This homilist considers the date of the crucifixion to be March 25th, but March 25th for him is "after the equinox".
The Venerable Bede also considered the creation to have happened at the time of the Spring equinox. For Bede, the world was first created on March 18. The sun and moon were created on March 21, the equinox.
Not until the fourth morning did the sun, rising from the midpoint of the east...inaugurate the equinox....The moon, on the other hand, was full at sunset, for the Creator, who is justice itself, would never make something in an imperfect state. It appeared...in the mid-point of the east, and stood in the fourth degree of Libra where the autumn equinox is fixed. (De Temporum Ratione 6).
But he acknowledges that "some have claimed that the first day of the world was on the 8th calends of April [March 25]" (De Temporum Ratione 6).