Half birthday ideas for kids

4 November 2026

A half birthday falls six months after a child's birthday, so a child born on 15 December has a half birthday on 15 June. It's a small, fun celebration, usually a half cake, half a song and a little treat, and it is especially welcome for children whose real birthday falls close to Christmas.

How do you work out a half birthday?

Add six months to the birthday and keep the same day of the month. A few dates need a little thought:

For dates on the 29th, 30th or 31st of a month, if the matching month is shorter, simply use its last day. Nobody is checking.

Who are half birthdays for?

• Christmas and New Year babies. A December birthday can get swallowed by Christmas, with combined presents and tired relatives. A half birthday in June gives them a day of their own.
• Summer-holiday birthdays. Children with birthdays in the school holidays often miss out on celebrating with their class. A half birthday in term time lets them bring something in, if the school allows it.
• Babies at six months. Some parents mark a baby's first six months with a photo and a little celebration.
• Anyone who loves a reason to celebrate. Some families do half birthdays for every child, every year.

Half birthday ideas

Half cake

Bake or buy a cake, cut it in half and serve only one side. Put on half a candle: cut a candle in two, or count half the years ("you're six and a half!"). Children find the idea of half a cake hilarious.

Half the song

Sing "Happy half birthday to you, happy half birthday to you..." and stop halfway through the last line.

Half-and-half day

• Half a sandwich for lunch, cut in a fun shape.
• Wear one sock from two different pairs.
• Half a card: a card cut down the middle, with a message on each half.
• Half an hour of their favourite thing, or half an hour later to bed.
• A half-and-half pizza with their two favourite toppings.

A small gift, not a big one

Keep presents small, so the half birthday doesn't compete with the real one: a book, a summer toy for the garden, or a day out. For Christmas babies, something for the summer, such as a paddling pool, bucket and spade or new sandals, makes sense in June.

Half birthday for a baby at six months

• A six-month photo next to the same teddy or blanket you used for the newborn photo, to show how much they've grown.
• A letter to your baby about their first six months: their first smile, their first laugh, what they love. See our guide to keepsake letters for children.
• A handprint or footprint, dated.
• A small family tea with grandparents who may have missed the newborn weeks.

Half birthdays for Christmas babies

If your child's birthday is in late December, a half birthday in June can do a lot to make up for a squashed real birthday. A few tips that help the real birthday too:

• Wrap birthday presents in birthday paper, never Christmas paper.
• Don't combine birthday and Christmas presents, even if relatives offer.
• Keep the decorations for the birthday separate from the tree and tinsel.
• Celebrate the half birthday in June with the outdoor party they can't have in December.

For more ideas for Christmas, see our guides to Christmas Eve traditions in the UK and keeping the magic of Santa alive.

For full-birthday ideas, see our kids' birthday traditions.