Matthew Poole and continuators on John 19:14

14 And it was the preparation of the passover , and about the sixth hour : and he saith unto the Jews, Behold your king y.

The preparation to any feast, signifies the day before it, because on that day they prepared whatsoever according to the Law was necessary for the Solemnization. Some much doubt, whither in this place the Passover signifies strictly the Paschal Supper, which it could not do, if the Iews strictly this year kept to the Law; for the fourteenth day of the month Nisan at evening, was the time when most certainly Christ kept it, who ate it the night before. It is therefore more probably thought, that by the Passover here, is meant their great Festival, which was upon the fifteenth day. (See the notes on Chap. 18.28.)

Iohn tells us it was about the sixth hour; that is, in the latter part of the interval, between nine a clock in the morning, and twelve at noon: for the division of the day according to the Iews, was in four parts; the first was from the rising of the Sun, till our nine in the morning, and was called the third hour; the other was from the third hour to the sixt, that is twelve a clock at noon; the third division was from their sixt hour to the ninth, that is, three a clock with us in the afternoon; the fourth division was from the ninth hour to Sunset, that is with us six a clock in the evening, when the Sun is in the Equinox. Now, not onely the time when any of these hours came, was called either the third or sixt hour; but the space of three hours alotted to each division, was so called when the next division began; so the time of our Saviours Crucifixion is recorded by Mark to be the third hour: that is, the whole space from nine a clock to twelve, was not quite gone, tho it was near at an end. And by the Evangelist, here 'tis said, that it was about the sixt hour, that is near our twelve a clock. And thus the different relations are clearly recorded.