Match officials to February 12
It's a busy weekend for refs as the Six Nations continues, while there's a return to domestic action in the Premiership, Pro12 and Top 14.
It's a busy weekend for referees as the Six Nations heads into Round Two, while there's a return to domestic action in the Aviva Premiership, Pro 12 and Top 14.
The fifth leg of the HSBC Sevens World Series takes place in Las Vegas, where South Africa will bid to defend their title.
Across the rest of the globe, Spain take on Georgia and Portugal host Russia in the European Nations Cup.
There's also more pre-season hit-outs before the start of the 2012 Super Rugby tournament which sees nearly all the participating teams in action.
Six Nations
Italy vs England at Stadio Olimpico
Referee: Jérôme Garces (France)
Assistant referees: George Clancy (Ireland), Neil Paterson (Scotland)
Television match official: Tony Redmond (Ireland)
France vs Ireland at Stade de France
Referee: Dave Pearson (England)
Assistant referees: Wayne Barnes (England), Andrew Small (England)
Television match official: Geoff Warren (England)
Wales vs Scotland at Millennium Stadium
Referee: Romain Poite (France)
Assistant referees: Peter Fitzgibbon (Ireland), Simon McDowell (Ireland)
Television match official: Giulio De Santis (Italy)
European Nations Cup
Spain vs Georgia in Madrid
Referee: David Wilkinson (Ireland)
Assistant referees: Michael Black (Ireland), Sean Gallagher (Ireland)
Portugal vs Russia in Lisbon
Referee: Ian Davies (Wales)
Assistant referees: Sean Brickell (Wales) , Martyn Lewis (Wales)
Pro 12, Round 14
Leinster vs Benetton Treviso at Royal Dublin Society
Referee: Leighton Hodges
Ulster vs Dragons
Referee: Carlo Damasco (Italy)
Edinburgh vs Ospreys
Referee: Leo Colgan (Ireland)
Aironi vs Munster at Stadio Zaffanella
Referee: tba
Glasgow Warriors vs Scarlets at Firhill Stadium
Referee: Nigel Owens (Wales)
Cardiff Blues vs Connacht at Cardiff City Stadium
Referee: Andrew McMenemy (Scotland)
Aviva Premiership
Sale Sharks vs Worcester Warriors
Referee: Mathieu Raynal (France)
Harlequins vs London Irish
Referee: Tim Wigglesworth
Bath vs Newcastle Falcons
Referee: Dean Richards
Gloucester vs Northampton Saints
Referee: JP Doyle
Exeter Chiefs vs Leicester Tigers
Referee: Sean Davey
London Wasps vs Saracens
Referee: Martin Fox
Top 14, Round 17
Montpellier vs Perpignan at Stade Yves du Manoir (Montpellier)
Referee: Sébastien Cloute
Biarritz vs Toulouse at Parc des Sports D'Aguilera
Referee: Patrick Pechambert
Agen vs Castres at Stade Armandie
Referee: Christophe Berdos
Lyon vs Brive at Matmut Stadium
Referee: Pascal Gauzere
Toulon vs Bordeaux-Bègles at Stade Mayol
Referee: Salem Attalah
Bayonne vs Paris at Stade Jean Dauger
Referee: Franck Maciello
Clermont vs Racing-Métro at Parc des Sports Marcel Michelin
Referee: Jean-Luc Rebollal
Sevens
Referees: Federico Anselmi (Argentina), Akihisa Aso (Japan), James Bolabiu (Fiji), Jason Jaftha (South Africa), Tui Komiti (Samoa), Anthony Moyes (Australia), Matthew O'Brien (Australia), Luke Pearce (England), Rasta Rashivenga (South Africa).
Super Rugby warm-ups
Highlanders vs Chiefs in Queenstown
Referee: Glen Jackson/Bryce Lawrence
Assistant referees: Bryce Lawrence/Glen Jackson
Hurricanes vs Crusaders at Mangatainoka
Referee: Garratt Williamson/Chris Pollock
Assistant referees: Chris Pollock/Garratt Williamson, Mark Long
Reds vs Brumbies at Barlow Park, Cairns
Referee: Angus Gardner
Assistant referees: Simon Moore, Aitu Tanga
Waratahs vs Samoa at Scully Park, Tamworth
Referee: Steve Walsh (Australia)
Assistant referees: James Leckie (Australia), Will Houston (Australia)
Rebels vs Blues at AAMI Park, Melbourne
Referee: Andrew Lees (Australia)
Assistant referees: Julian Pritchard (Australia), Beau-Dean Gosper (Australia)
Sharks vs Boland Cavaliers at Kings Park
Referee: Craig Joubert
Assistant referees: Sindile Mayende, Reuben Rossouw
Southern Kings vs Stormers at Nelson Mandela Bay Stadium
Referee: Lourens van der Merwe
Bulls vs Cheetahs at Peter Makoba Stadium, Polokwane
Referee: Jaco Peyper