Yes. I found out about it back in the 70s from a former boss. He couldn't put anything aside from his regular check, so he just overpaid. Filed every September, got his money between Halloween and Christmas, with interest.
It made sense, and I had two incidents where mistakes were made and I wound up getting refunds, in whole or in part, much later than I should have. Interest each time I got them.
A few years later, taking a tax prep course from an IRS agent, an item was brought up about that April 15th deadline. Earlier in the Reagan administration, they had try to penalize people with refunds coming that didn't file by April 15. It lasted on season, and those that failed to file and were penalized were refunded their penalty with interest. Go figure.