I wear Highland Dress much less often than many/most people here, I would imagine.

1) as a working piper I wear Highland Dress to do gigs.

2) I wear band kit when performing with my Pipe Band.

3) having not owned a suit in many years, I wear Highland Dress for those rare occasions when I attend an event where suits are expected.

4) I sometimes wear Highland Dress to Scottish-themed events I attend, say a Highland Games or Scottish concert.