Each year on 12 July, Protestant Orangemen march to commemorate Prince William of Orange's 1690 Battle of the Boyne victory over Catholic King James II.
These marchers were heading towards their demonstration in south Belfast, one of 17 such events across Northern Ireland.
A woman watches the parade go past in Belfast. This year, Orange leaders have moved to make the event more family-friendly and inclusive.
Purple and orange balloons were released into the sky over Belfast, one for every year since 1690.
In Belfast at least, it was a drizzly morning but that didn't stop these women from enjoying their parade.
And this Orangeman was determined not to let the rain spoil his fun.
Orangemen from 170 lodges took part in the Twelfth celebrations in Armagh.
DUP leader Ian Paisley was guest of honour at the Independent Orange Order parade in Portrush.
Ulster Unionist Party leader Sir Reg Empey was pictured at the day's festivities.
Ian Eagleson took on the role of William of Orange at the celebrations in Bangor, County Down.