How do you guys categorize months?

So for context, I'm obviously Irish and I was having a debate with 2 American and 1 Danish friend. Essentially we categorize months slightly differently and we're turning to reddit to settle the debate.

The way I categorize it is:

SPRING: Feb, Mar, Apr

SUMMER: May, June, July

Autumn: August, September, October

Winter: November, December, January,

The Americans and Danish do it this way:

SPRING: Mar, Apr, May

SUMMER: June, July, August

Autumn: September, October, November

WINTER: December, January, February