How many seconds are in a day?

86,400 seconds (24 × 60 × 60).

How many hours in a year?

A 365-day year has 8,760 hours. A 366-day leap year has 8,784.

We use 30 days for a 'month' as the standard approximation. For exact calendar math, use specific dates rather than a generic month length.

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1 min = 60 s

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