What was the most significant moment in the history of Robin and Barney's relationship on How I Met Your Mother?

The relationship between Robin Scherbatsky and Barney Stinson on How I Met Your Mother had many significant moments throughout the show's nine seasons. However, the most memorable and significant moment in their relationship was their wedding day.

The two characters had an on-again, off-again relationship throughout the series, with many ups and downs, including Robin's brief marriage to Barney's friend, Kevin. Despite their past issues, the couple eventually got engaged, and their wedding day was the culmination of their love story.

The wedding was a two-part episode in which the gang traveled to Farhampton, where the wedding was being held. The day was full of surprises, including Robin's revelation that she couldn't have children, which had been a point of contention between the couple. However, Barney reassured her that it didn't matter, and the two were married in a beautiful outdoor ceremony.

The episode also featured a flash-forward scene that showed the couple getting a divorce three years later, but the significance of their wedding day remained. It was the moment that the two characters, who had been through so much together, finally committed to each other in front of their friends and family.