- The six
- England, France, Ireland, Italy, Scotland and Wales. Everybody plays everybody once, which is five matches each and fifteen in the Championship.
- Round 1
- Friday 5 and Saturday 6 February 2027. It opens under lights in Dublin with Ireland against England, alongside Scotland v Italy and France v Wales.
- Round 2
- Saturday 13 and Sunday 14 February 2027, with England against France falling on Valentine's Day.
- Round 3
- Saturday 20 and Sunday 21 February 2027.
- The fallow weekend
- 27 and 28 February 2027, and it is the only one. Three rounds back to back, a break, then two more. Tighter than a typical Championship, so a comp that goes quiet over the gap loses people.
- Round 4
- Friday 5 and Saturday 6 March 2027.
- Super Saturday
- Saturday 13 March 2027. All three closing fixtures on the same day, staggered, with the table still live in every one of them.
- On New Zealand time
- A Friday night Test in Europe is Saturday morning here, and the Saturday afternoon games land in the small hours of Sunday. A round runs from Saturday breakfast into the early hours of Monday.
- The points system
- Four for a win, two for a draw, one for scoring four or more tries, and one for losing by seven points or fewer. A Grand Slam adds three more on top. The try and losing bonuses came in for 2017 and changed what a close defeat is worth.
- What is being played for
- The Championship itself, the Grand Slam for winning all five, the Triple Crown if one of England, Ireland, Scotland or Wales beats the other three, and the wooden spoon, which is unofficial, has no trophy, and is the only one somebody is guaranteed to win.
- How the table splits ties
- Match points first, then points difference, then tries scored. Unions still level are placed equally, which means the Championship can genuinely be shared.