Start the conversation with your children’s other parent as early as possible, to give yourself plenty of time to come to an arrangement and so that the children know what to expect. Some people even agree what will happen a year in advance.
Don’t expect to get anything agreed the first time you discuss it. As for all families, it can take a bit of complicated diary juggling to ensure that everyone sees everybody they should.
Is it vital that you both see them on Christmas Day itself? In the UK we tend to put a lot of pressure on one day, but many parents arrange a 'fake Christmas'. This way both parents get a whole day together (and with new partners or members of their extended family) to do all the traditional festive things, just on a different day. And the children get to celebrate twice - what’s not to love?!
Some parents arrange a time on Christmas Day for the parent who doesn’t have them at their house that day to drop in for a spot of festive cheer around the Christmas tree, and to watch the children open their presents.
Others have an arrangement where the children have Christmas Eve and Christmas morning in one house and then go to see their other parent (and his or her family) for Christmas lunch and evening.
Many parents do the same thing every year, whilst others alternate arrangements each year so that nobody need feel hard done by.
What will work best (for you, the children, their other parent, and new partners and families) will depend on how easy you find it to be all together, how far apart you live, and how many other members of your family the children are keen to see over Christmas.
The only important thing is that you avoid putting your children under pressure to choose, or allow them to feel that they have somehow let one of you down by enjoying Christmas with their other parent.
