Who made the decision to celebrate Christmas on December 25th?

Answer 1

It's actually an unknown date when the birth of Jesus took place. The first recorded date of Christmas being celebrated in December 25th was in the year 336 AD, during the time of the Roman Emperor Constantine, who also was the first Christian Emperor. It's said that the December 25th date was chosen because of the Winter Solstice and the Roman midwinter festivals called 'Saturnalia' and 'Dies Natalis Solis Invicti', both of which took place around this time of the year.
The early Christians changed the birthday of the pagan God Saturn, which falls on 25/12. As the birthday of Jesus.

Answer 2

It is mixed and unclear exactly how the date was set. It was actually a combination of the Vatican Church of Rome's declaration that it was the day of the birth of Jesus mixed in with the day of the Paegen Celebration of the Winter Solstice.

Answer 3

Well, No one will know for sure who chose December 25. All we know is that we celebrate Christmas on that Particular day. It might have been God, father of all living things. Might have been Jesus' Birthday. Who knows? Only time will tell why.
Answer:
The most obvious answer is that the date for Christmas was put as December 25th to provide continuity with the winter solstice traditions of many cultures. By doing this converts could continue to have a traditional midwinter celebration. Many scholars indicate that an actual Christmas Day celebration would be between May and July.

Answer 4

your an idiot December 25th is Jesus christs birthday, no one chose it