Referees to 4 February
The European Nations Cup gets going. It is being played in a double round over two seasons and will not end till 2008. It starts off with two neighbourly rivalries - Romania against Georgia and Portugal against Spain. Romania are the titleholders.
The Women's Six Nations also starts with Italy playing instead of Spain. England are the titleholders.
And then in Wellington, New Zealand, the IRB Sevens Series resumes.
The Welsh Premiership match between Glamorgan Wanderers and Cardiff will have Steve Walsh as the referee as he shakes off the cobwebs in readiness for his Six Nations match. But then Nigel Whitehouse and Nigel Owens are also refereeing in the same competition that Saturday.
Marius Jonker will referee his first Six Nations match and it is the most historic of them all - the Calcutta Cup match at Twickenham.
International
Six Nations
Italy vs France at Stadio Flaminio
Referee: Wayne Barnes (England)
Touch judges: Dave Pearson (England), Rob Debney (England)
Television match official: Tim Hayes (Wales)
Assessor: Michel Lamoulie (France)
England vs Scotland at Twickenham
Referee: Marius Jonker (South Africa)
Touch judges: Alain Rolland (Ireland), Federico Cuesta (Argentina)
Television match official: Donal Courtney (Ireland)
Assessor: Paul Bridgman (England)
Wales vs Ireland at Millennium Stadium
Referee: Kelvin Deaker (New Zealand)
Touch judges: Steve Walsh (New Zealand), David Changleng (Scotland)
Television match official: Graham Hughes (England)
Assessor: Steve Hilditch (Ireland)
European Nations Cup
Romania vs Georgia at Stade Steaua in Bucharest
Referee: Colin Stanley (Ireland)
Touch judges: Alan Rogan (Ireland), David Wilkinson (Ireland)
Portugal vs Spain at Stade Universitaire in Lisbon
Referee: Herve Dubes (France)
Touch judges: Didier Mene (France), Vincent Azoulay (France)
A Internationals
England Saxons vs Italy A at Sandy Park, Exeter
Referee: David Changleng (Scotland)
Touch judges: Andy Macpherson (Scotland), David Anderson (Scotland)
Assessor: Brian Leigh
Television match official: Andy Ireland (Scotland)
Under-21
Wales vs Ireland
Referee: Bruce Robertson
Touch judges: Chris White, Bob Mullis
Italy vs France in Parabiagio
Referee: Gwyn Morris (Wales)
Touch judges: David Jones, David Williams (both Wales)
Under-20
England vs Scotland at The Rec, Bath
Referee: Peter Fitzgibbon (Ireland)
Touch judges: Eanna O'Dowd (Ireland), Paul Haydock (Ireland)
Assessor: Brian Campsall (England)
Ireland vs France at Dubarry Park
Referee: tba
Women
England vs Scotland at Old Albanians
Referee: Ger English (Ireland)
Touch judges: Nick Clarke, Kevin Morgan (both England)
Assessor: Clive Nicholas (England)
Wales vs Ireland at Taffs Wells, Cardiff
Referee: Greg Garner(England)
Assessor: Mikel Mellick (England)
Italy vs France in Biella
Referee: Matthew Aplin (Wales)
Sevens
IRB Sevens Series - Wellington, New Zealand
Referees: Gareth Lloyd-Jones (South Africa), Julian Pritchard (Australia), Marcelo Pilara (Argentina), Taizo Hirabayashi (Japan), Eva Mafi (Tonga), Matt Stanish (New Zealand), Chris Rooney (New Zealand), Brent Murray (New Zealand)
Touch judges: Kane McBride, James McPhail, Josh Noonan, Shane McDermott, Garratt Williamson (all New Zealkand), Andrew Lindsay (Australia), Mike Fraser, Hamish Mexted (both Wellington Referees)
Referee Managers: Paddy O'Brien (IRB), Colin Hawke (New Zealand)
IRB selector: Bob Francis
Super 14
Week 1
Blues vs Crusaders in Auckland
Referee: Paul Honiss (New Zealand)
Touch judges: Bryce Lawrence (New Zealand), Gary Wise (New Zealand)
Television match official: Ben Skeen (New Zealand)
Western Force vs Highlanders in Perth
Referee: JC Fortuin (South Africa)
Touch judges: Pro Legoete (South Africa), James Scholtens (Australia)
Television match official: Bradley Wahl (Australia)
Lions vs Waratahs in Johannesburg
Referee: Chris Pollock (New Zealand)
Touch judges: Keith Brown (New Zealand), Johann Meuwesen (South Africa)
Television match official: Shaun Veldsman (South Africa)
Chiefs vs Brumbies in Hamilton
Referee: Mark Lawrence (South Africa)
Touch judges: Deon van Blommestein (South Africa), Gary Wise (New Zealand)
Television match official: Ben Skeen (New Zealand)
Reds vs Hurricanes in Brisbane (New Zealand)
Referee: Jonathan Kaplan (South Africa)
Touch judges: Christie du Preez (South Africa), Stuart Dickinson (Australia)
Television match official: James Leckie (Australia)
Sharks vs Bulls in Durban
Referee: Lyndon Bray (New Zealand)
Touch judges: Vinny Munro (New Zealand), Jaco Peyper (South Africa)
Television match official: Johann Meuwesen (South Africa)
Cheetahs vs Stormers in Bloemfontein
Referee: Craig Joubert (South Africa)
Touch judges: Linston Manuels (South Africa), Deon van Blommestein (South Africa)
Television match official: Shaun Veldsman (South Africa)
England
National Division 1
Coventry vs Doncaster
Referee: Llyr Apgeraint Roberts
Touch judges: Alan Biggs, Steve Makinson
Assessor: Paul Emberson, Mike Winnell
Coach: Clive Leeke
Exeter Chiefs vs London Welsh
Referee: David Rose
Touch judges: Keith Lewis, Kevin Obern
Newbury vs Moseley
Referee: Rowan Kitt
Touch judges: Gareth Copsey, Dave Grashoff
Assessor: Chris Harrison
Pertemps Bees vs Plymouth Albion
Referee: Adrian Hartwell
Touch judges: Richard Draper, Peter Facey
Assessor: John Haggart
Waterloo vs Otley
Referee: Dale Newitt
Touch judges: Steve Lander, Steve Savage
Cornish Pirates vs Sedgley Park
Referee: Terry Hall
Touch judges: Steve Leyshon, Fred Spong
Assessor: Ian Hamilton
Leeds Tykes vs Bedford Blues
Referee: Ashley Rowden
Referee: Chris Seeley, Barry Dalby
Nottingham vs Earth Titans
Referee: Tim Wigglesworth
Touch judges: Dave Edmunds, James Minards
Friendlies
British Police vs British Fire Services at Stourbridge
Referee: Keith Lewis
Touch judges: Eric Woodmason, Fred Farndon
Assessor: Bob Bullock, Jim Marr
Oxford University vs Royal Air Force
Referee: Rowan Kitt
Touch judges: P Davies, Paul Burton
Assessor: Steve Leyshon, Chris Harrison
Portugal
Campeonato Nacional I Divis?o - 10? Jornada
Lousa vs AA Coimbra
Referee: Pedro Murinello
Belas vs Vilamoura
Referee: Tiago Silva
CRAV vs Caldas
Referee: Fernando Martins
UTAD vs Evora
Referee: Arsenio Tomas
South Africa
Friendlies
Free State vs Western Province at Vodacom Park, Bloemfontein
Referee: Phillip Bosch (SARU)
Griquas vs Griffons at Vodacom Park, Bloemfontein
Referee: Lourens van der Merwe (Free State)
Lions vs Boland at Bosman Stadium, Brakpan
Referee: George Roper (Blue Bulls)
Valke vs Boland at Bosman Stadium, Brakpan
Referee: Chris Healey (KwaZulu Natal)
Wales
Premier Division
Maesteg vs Swansea
Referee: Nigel Whitehouse
Touch judges: Gareth Simmonds, Jeff Wood
Ebbw Vale vs Bedwas
Referee: Neil Ballard
Touch judges: Darren Evans, Tim Davies
Glamorgan Wanderers vs Cardiff
Referee: Steve Walsh (New Zealand)
Touch judges: Mike Bethell, Rob Hale
Bridgend vs Aberavon
Referee: Hugh Watkins
Touch judges: Kevin Brooks, Neil McDonagh
Neath vs Llandovery
Referee: Nigel Owens
Touch judges: Terry Thomas, Gareth Butler
Llanelli vs Cross Keys
Referee: James Jones
Touch judges: Colin Kirkhouse, Gordon Walker