Prepositions of Time: in, on, at

in/on/at ≈ में/को/पर/बजे — a real parallel, different vocabulary

Hindi doesn't use one all-purpose time-marker either: months, years, and seasons take में (जुलाई में, 2024 में), specific days and dates take को (सोमवार को), special occasions often take पर (जन्मदिन पर), and clock hours take the word बजे on its own with no separate postposition (5 बजे — literally '5 having struck'). So English's in/on/at split isn't an alien concept; it's essentially the same instinct Hindi already has, just mapped onto three English words instead of four Hindi markers. The safest approach is to learn each English time-word as its own small category — in for broad periods, on for days/dates, at for exact clock times — rather than translating word-for-word from the Hindi markers.