Everyone agrees (even watchtower) that no one knows the date of Jesus' birth.
When our wedding anniversary falls on an inconvenient date, we celebrate it the next convenient date.
Fact is we don't knwo why it was chosen, though we can specualte, but we do know WHy it is celebrated now, it is the day we celebrate the birth of
our saviour, Jesus Christ, as a human. We don't celebrate the DATE, we celebrate the event, an anniversary if you prefer.
totally agree
Watchtower however has to poop on the date everyone arbitrarily chose as Jesus' birth.