A good DX band is 15m. This is mainly a daytime DX band, but evening openings are increasing as the sunspot count and solar flux go up. These days I am on RX far more than TX.
This was not the case when the Pipit transceiver was designed and built. This would have been over 30 years ago! For several months it was the only rig I used despite only being 800mW. These days there is more FT8 activity, but you cannot beat the thrill of getting heard thouasnds of miles away and having solid QSOs.See https://sites.google.com/view/g3xbm4/home/hf-mf-and-lf/homebrew/15m-qrp-cw-pipit .