Is it disrespectful to get married on important Christian holidays like Christmas or Easter weekend?
It is not, these dates are periods that have been chosen to celebrate these particular events. It is not disrespectful in and of itself to marry on any of these days.
Man has no idea the actual day that Jesus was born, Not even Herod who attempted to kill Jesus. Herod had new borns to two years old killed which is to say he did no know the day of Jesus birth.
15 And was there until the death of Herod: that it might be fulfilled which was spoken of the Lord by the prophet, saying, Out of Egypt have I called my son.
16 Then Herod, when he saw that he was mocked of the wise men, was exceeding wroth, and sent forth, and slew all the children that were in Bethlehem, and in all the coasts thereof, from two years old and under, according to the time which he had diligently inquired of the wise men.
Easter weekend is also supposition regardless of the masses that believe and teach about Good Friday and Easter Sunday.
Jesus died on a Wednesday
The other important note to make about Jesus’ death, which has been the source of tradition, is the advent of Good Friday, which suggest Jesus died on the cross on a Friday. The reality is that Jesus’ time of death was 3PM - Wednesday AD 31.
When Jesus died He was quickly buried because of the oncoming Feast of Unleavened Bread, a high day which began at sunset on Wednesday to sunset on Thursday - Luke 23:46-54.
Luke 23:54 “And that day was the preparation, and the sabbath drew on”
Many have assumed this was the weekly Sabbath and that Jesus was crucified on a Friday. There are two distinct high days or Sabbaths referred to in this week. The weekly Sabbath is sunset Friday to sunset Saturday verses the first day of Unleavened Bread, a high annual Sabbath - Sunset Wednesday to Sunset Thursday.
John 19:31 (for that sabbath day was an high day) - (Exodus 12:16-17; Leviticus 23:6-7)
The annual Holy Days usually fall on weekdays, other than the regular weekly Sabbath days, sunset Friday - sunset Saturday.
Luke 23:54-56 the women saw Jesus’ body being laid in the tomb just before sunset Wednesday
They “returned and prepared spices and ointments”
Preparing spices would not have been done on a Sabbath day, Friday - Saturday, since it would have been considered a violation of the Sabbath.
This is verified by Mark’s account, which states, “Now when the Sabbath was past, Mary Magdalene, Mary the mother of James, and Salome bought spices (which they would not have purchased on the high-day Wednesday - Thursday (Mark 16:1).
The women had to wait until this annual “high day” was over before they could buy and prepare the spices to be used for anointing Jesus’ body. After purchasing and preparing the spices and oils on Friday, “they rested on the Sabbath according to the commandment” (Luke 23:56).
The second Sabbath mentioned in the Gospel accounts is the regular weekly Sabbath, observed from sunset Friday to sunset Saturday.
Mark tells us the women bought spices after the Sabbath, Luke states they prepared the spices before resting on the Sabbath—two different Sabbaths.
John 19:31 - The first Sabbath was a “high day”— the first day of the Feast of Unleavened Bread—which, in A.D. 31, fell on a Wednesday.
The second was the weekly seventh-day Sabbath - Sunset Friday - Sunset Saturday
Jesus died at the 9th hour of the day. Matthew 27:45-50 - 3PM
After the women rested on the regular weekly Sabbath Friday - Saturday, they went to Jesus’ tomb early on the first day of the week (Sunday), “while it was still dark” (John 20:1), and found that He had already been resurrected (Matthew 28:1-6; Mark 16:2-6; Luke 24:1-3).
Jesus was crucified and entombed on Wednesday afternoon, just before the Sabbath began at sunset. The high-day Sabbath, lasting from sunset Wednesday to sunset Thursday, rather than the regular weekly Sabbath, lasting from sunset Friday to sunset Saturday.
Jesus rose anytime from 3PM Saturday - He was already gone early Sunday when Mary arrived. Matt 28:1-6, Jesus rose precisely three days and three nights after He was placed in the tomb, you can’t get 3 day and 3 nights from Friday to Sunday morning.
With that said, do what pleases your heart…