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SecsPerDay

SecsPerDay = 86400

Example​

function DaysToSeconds(const Days: Integer): Int64;
begin
  Result := Int64(Days) * SecsPerDay;
end;

Usage​

SecsPerDay defines a nominal 24-hour day as 86,400 seconds for explicit elapsed-unit conversion.

Additional Technical Info​

The modified PascalScript Classes compiler registers SecsPerDay from Delphi SysUtils as a signed LongInt. It is the nominal product 24 * 60 * 60.

Use it for explicit conversion where a source or destination contract defines days as fixed 86,400-second intervals. It is not a TDateTime value and contains no timezone, date or daylight-saving information.

A local civil day may span 23 or 25 elapsed hours when the timezone offset changes. Conversely, a duration of 86,400 seconds can land at a different local wall-clock time on the next date. Delphi date/time values also do not represent leap seconds. Use IncDay for calendar-day semantics and a UTC/instant representation for elapsed-time semantics.

Signed LongInt can hold 24,855 complete 86,400-second days but the next multiplication exceeds its maximum. Promote before multiplication and bound external input. The example uses Int64 and was source-reviewed only; no conversion was executed.

Related Code Library entries

  • MSecPerDay - nominal milliseconds per day and its 25-day LongInt limit.
  • IncDay - calendar-day increment.

External references

Created 2026-07-15