When did ireland rugby last win the grand slam?
No context provided
When did ireland rugby first win the grand slam?
29 March 1948
No context provided
When did ireland rugby last win its second grand slam?
21 March 2009
No context provided
When did ireland rugby last win its third grand slam?
10 March 2018
Grand Slam (rugby union)
https://en.wikipedia.org/wiki/Grand%20Slam%20%28rugby%20union%29
In rugby union, a Grand Slam (Irish: Caithréim Mhór. Welsh: Y Gamp Lawn. French: Grand Chelem) occurs when one team in the Six Nations Championship (or its Five Nations predecessor) beats all the others during one year's competition.
Grand Slam (rugby union)
In rugby union, a Grand Slam occurs when one team in the Six Nations Championship, or its Five Nations predecessor, beats all the others during one year's competition.  Ireland rugby won its first Grand Slam on 29 March 1948. Ireland won its second on 21 March 2009. Ireland rugby won its third Grand Slam on 10 March 2018.