Interesting case: in Thai (which is my mother tongue), both the words "วันหน้า" (literally "front day") and "วันหลัง" (literally "back day" or "behind day") both mean "(in a) later (day)". (Yes, it's kinda illogical, like "flammable" vs "inflammable".)

Personally, I think of the past being on the left, and the future being on the right. (Thai is written from left to right, like English.)