Bottom bracket threading direction is the opposite from pedals.

Backwards (towards the back of the bike, over-hand) to tighten, and Forwards (towards the front of the bike, over-hand) to loosen.

The reverse-thread pedal is on the left (non-drive side) while the reverse-thread bottom bracket cup is on the right (drive side.)

(Except for some weird old out of date standards like Italian and French)