Capricious weather is usually associated with April. So when Muscovites woke up on Wednesday, May 7, and saw snowflakes outside their windows, they were quick to spread the word about the freak weather conditions.

Comments ranged from the annoyed to the incredulous. In fact, the unexpected return to winter weather sparked its own trend on Twitter. As snowflakes fell, "Снег 7"("Snow 7") rose to the site's trending topics - a list that indicates which subjects are currently the most discussed among Twitter users.

The topic was also popular on photo sharing site Instagram, with people posting views of the world outside their windows.

The contrast between green trees and white flakes reflects the sunny spring weather Moscow had been enjoying in recent weeks.

And the sudden change seemed to give some Internet services a hard time to stay up to date, as one user noted. "Snow on May 7, and who to believe - Yandex or Apple", he wrote, including a photo of two diverging weather forecasts.

While the snow provided inspiration for many social media posts, there may also be a deeper relevance to the freak event. After all, Moscow is just two days away from it's traditional Victory Day parade. And officials have been known to use all kinds of techniques to get rid of all these pesky clouds beforehand.

The one thing that remains, then, is to see whether this Twitter user will be proved right. "Snow in May. Sure. Repeat in June", she wrote.