Docs / Date & time

DateDiff()

DateDiff is an AMPscript function in the date & time category. Units: Y, M, D, H, MI.

Syntax

DateDiff(start, end, unit)

Example

%%=DateDiff("2026-08-01", "2026-08-13", "D")=%%
Rendered output
12

Output produced by AmpSend's AMPscript engine (validated against Salesforce's own test corpus) - not a hand-written result.

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Official Salesforce documentation

DateDiff in the official AMPscript reference - or browse the official index of AMPscript functions for platform behavior and edge cases.

Related date & time functions

NowGetSendTimeDateParseDateAddDatePartFormatFormatDateFormatNumberLocalDateToSystemDateSystemDateToLocalDate