Steve Walsh probably has the big one this week as rugby makes history by packing out Croke Park in Dublin, the great holy place of Gaelic games.
There is so much else - Six Nations, a World Cup qualifier and Super 14 round 2. The world's eyes will be on rugby and therefore on the match officials.
Andy Macpherson of Scotland will be refereeing his first Test.
JC Fortuin was replaced because of an eye infection by Marius Jonker.
Internationals
Six Nations
England vs Italy at Twickenham
Referee: Nigel Owens (Wales)
Touch judges: Joël Jutge (France), Christophe Berdos (France)
Television match official: Hugh Watkins (Wales)
Assessor: Michel Lamoulie (France)
Scotland vs Wales at Murrayfield
Referee: Alan Lewis (Ireland)
Touch judges: Chris White (England), Federico Cuesta (Argentina)
Television match official: Rob Debney (England)
Assessor: Douglas Kerr (Scotland)
Ireland vs France at Croke Park,
Referee: Steve Walsh (New Zealand)
Touch judges: Kelvin Deaker (New Zealand), Malcolm Changleng (Scotland)
Television match official: Peter Allan (Scotland)
Assessor: Steve Hilditch (Ireland)
European Nations Cup
Spain vs Russia in Madrid
Referee: Andy Macpherson (Scotland)
Touch judges: Andy Ireland, Alan Forrest (both Scotland)
World Cup Qualifier
The winner of this one goes to France for the World Cup.
Tonga vs Korea in Auckland
Referee: Matt Goddard (Australia)
Touch judges: George Ayoub, James Scholtens (both Australia)
Under-21 Six Nations
England vs Italy in Bath
Referee: Cédric Marchat (France)
Touch judges: Bernard Dal Maso, Eric Soulan (both France)
Assessor: Brian Leigh
Ireland vs France
Referee: tba (Scotland)
Scotland vs Wales
Referee: tba (Italy)
Deaf
Scotland vs Wales
Referee: tba
Tour
Argentina vs Northampton Saints at Franklin's Gardens
Referee: Martin Fox (England)
Touch judges: Rob Debney, Paul Dickens
Assessor: Gary Welsh
Argentina vs Leicester Tigers at Welford Road
Referee: Ashley Rowden (England)
Touch judges: Wayne Barnes, Don Helme
Women
England vs Italy at Twickenham
Referee: Nicky Inwood (New Zealand)
Touch judges: Clare Daniels, Deborah Innes
Assessor: David Warren
Ireland vs Wales
Referee: Gary Gordon (Scotland)
Scotland vs Wales
Referee: tba
Touch judges: Colin Brett, Peter Carruthers (both Scotland)
Assessor: Andy Clift (Scotland)
Holland vs France A in Amsterdam
Referee: Johnny Meersman (Belgium)
Touch judges: John Van Beeck, Jos Verschaeren (both Belgium)
Sevens
IRB Series in San Diego
Referees: Matt Stanish (New Zealand), Gareth Lloyd-Jones (South Africa), Marcelo Pilara (Argentina), Phil Smith (Canada), Graeme Bullen (USA), Taizo Hirabayashi (Japan), Eva Mafi (Tonga)
Super 14
Week 2
Chiefs vs Hurricanes in Hamilton
Referee: Bryce Lawrence (New Zealand)
Touch judges: Paul Honiss (New Zealand), Gary Wise (New Zealand)
Television match official: Chris Rooney (New Zealand)
Stormers vs Western Force in Cape Town
Referee: Lyndon Bray (New Zealand)
Touch judges: Vinny Munro (New Zealand), Linston Manuels (South Africa)
Television match official: Shaun Veldsman (South Africa)
Sharks vs Waratahs in Durban
Referee: Chris Pollock (New Zealand)
Touch judges: Keith Brown (New Zealand), Deon van Blommestein (South Africa)
Television match official: Johann Meuwesen (South Africa)
Crusaders vs Reds in Christchurch
Referee: Mark Lawrence (South Africa)
Touch judges: Craig Joubert (South Africa), Gary Wise (New Zealand)
Television match official: Ben Skeen (New Zealand)
Brumbies vs Blues in Canberra
Referee: Jonathan Kaplan (South Africa)
Touch judges: Christie du Preez (South Africa), Stuart Dickinson (Australia)
Television match official: Andrew Lindsay (Australia)
Bulls vs Cheetahs in Pretoria
Referee: Marius Jonker (South Africa)
Touch judges: Phillip Bosch (South Africa), Pro Legoete (South Africa)
Television match official: Shaun Veldsman (South Africa)
Lions vs Highlanders in Johannesburg
Referee: Paul Marks (Australia)
Touch judges: Brett Bowden (Australia), Jaco Peyper (South Africa)
Television match official: Johann Meuwesen (South Africa)
England
EDF Energy National Trophy - Round 5
Leeds Tykes vs Cornish Pirates
Referee: Andrew Small
Touch judges: Trevor Fisher, Rob Sawyer
Assessor: Nigel Yates
Bedford Blues vs Exeter Chiefs
Referee: Roy Maybank
Touch judges: JP Doyle, Paul Burton
Bridgwater & Albion vs Newbury
Referee: Llyr Apgeraint Roberts
Touch judges: Nigel Higginson, Fred Spong
Assessor: Mike Winnell
Coventry vs Nottingham
Referee: Greg Garner
Touch judges: Chris Seeley, Martin Buck
Assessor: Peter Farrell
Coach: Clive Leeke
Doncaster vs London Welsh
Referee: Dean Richards
Touch judges: Guy Steele-Bodger
North Walsham vs Lydney
Referee: Terry Hall
Touch judges: Darryl Chapman, Kevin Morgan
Assessor: Clive Nicholas, Tony Rossall
Pertemps Bees vs Nuneaton
Referee: Andrew Vertigan
Touch judges: Alan Biggs, Steven Halliday
Assessor: G Blackburn, David Wilson
Plymouth Albion vs Cambridge RUFC
Referee: Nick Williams
Touch judges: Eric Woodmason, Martin Summerhayes
Assessor: John Haggart
Intermediate Cup Quarter-finals
Broughton Park vs Kendal
Referee: Revis Phillips
Touch judges: David Crooks, Nigel Fallon
Dunstablians vs Haywards Heath
Referee: P Davies
Touch judges: Paul Smith, Chris Challinor
Newton Abbott vs Caldy
Referee: Paul Kimber
Touch judges: Lloyd Jackson, Ron Smerdon
South Leicester vs Mounts Bay
Referee: Glenn Ohara
Touch judges: Dave Miller, Richard Massey
Portugal
Campeonato Nacional Honra - 6ª Jornada
Belenenses vs Direito
Referee: João Mourinha
CDUL vs CDUP
Referee: Rohan Hoffman
Tecnico vs Agronomia
Referee: António Moita
Cascais vs Benfica
Referee: Arsénio Tomás
Campeonato Nacional I Divisão - 11 ª Jornada
Caldas vs Lousa
Referee: João Erse
AA Coimbra vs Belas
Referee: tba
Evora vs Vilamoura
Referee: Tiago Silva
UTAD vs CRAV
Referee: Oleg Dudcó
South Africa
Friendlies
Wildebeest vs Border at ABSA Stadium, Durban
Referee: Stuart Berry (KwaZulu Natal)
Blue Bulls vs Free State in Hopetown
Referee: Willie Roos (SARU)
Assessor: Tappe Henning (SARU)
Eastern Province vs Valke at EPRU Ground, Port Elizabeth
Referee: Mtheleni Msileni (Eastern Province)
Wales
Premiership
Cross Keys vs Aberavon
Referee: Jonathan Mason
Touch judges: Gerald Davies, Phil Evans
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