Syntax

DAYS360(start_date, end_date, [method])

Arguments

The printed syntax lists 3 argument(s), in order:

  • start_date
  • end_date
  • etho optional

“optional” marks an argument Google prints in square brackets; “repeatable” marks one Google prints with “…”.

Description from Google Docs Editors Help

“Returns the difference between two days based on the 360 day year used in some financial interest calculations.”

Google’s help article for DAYS360 →

Source: Google Docs Editors Help, “Google Sheets function list” (support.google.com/docs/table/25273), record record 6 of 516, data fetched 28 September 2026. Data month: September 2026.