Hello Ana, we use the phrase "spring forward" in the UK as a reminder that our clocks have to be moved forward and not backwards in the spring. We use this phrase because "spring" has a double meaning - as the season and also as part of the phrasal verb "to spring forward", meaning to jump forward or move forward quickly. We don't say "spring backwards". Of course the noun spring (meaning the season) has no tense, so "sprung forward" in this context sounds unnatural and we don't use it. We would just say something like "we moved the clocks back (or backwards) last Sunday". In other contexts it might be fine, for example "my business was doing badly but then last year it sprung forward". I hope that is clear!