Subtract From A Date

Move a date back by a number of years, months, days, hours or other units.

What it does

Subtract From A Date takes Date to subtract from, removes Duration of the chosen Time unit to subtract, and writes the new date into a field named by Output field name.

• Units: year, quarter (3 months), month, week (7 days), day, hour, minute, second.
• The calculation uses your computer’s local time zone.
• Going back a month from the 31st rolls over when the earlier month is shorter: 31 March minus 1 month gives 3 March (or 2 March in a leap year), not 28 February.

When to use it

• Build the start of a “last 7 days” or “last 24 hours” window.
• Work out when a reminder should fire before a deadline.
• Find a date one year ago for a comparison.

Inputs and settings

设置项	类型	作用
Date to subtract from 必填（必填）	Date and time	The date to subtract days from.
Time unit to subtract 必填（必填）	Choice	The time unit to subtract from the date. Options: year, quarter, month, week, day, hour, minute, second.
Duration 必填（必填）	Number	The duration to subtract from the date.
Output field name 必填（必填）	Text	The name of the output field.
Options	Group	The options for the node.
Options › Include input fields	Toggle	Whether to include the input fields in the output. 默认值：Off

Date to subtract from accepts a picked date or an expression such as {{ $input.deadline }}. ISO dates (2026-03-01, 2026-03-01T09:30:00Z) are the safest format.

Outputs

• Output

The item holds the new date under Output field name. Turn on Include input fields to keep the incoming fields next to it.

Dependencies and credentials

None. This node needs no connection and has no slots for other nodes.

Example workflow

Keep only feed items from the last 24 hours:

1. RSS Feed Read, URL of a news feed.
2. Split Out, Field To Split Out items, Output field name article, so each article becomes its own item.
3. Get Current Date, Output field name now, Include input fields on.
4. Subtract From A Date, Date to subtract from {{ $input.now }}, Time unit to subtract day, Duration 1, Output field name since, Include input fields on.
5. Filter: {{ $input.article.isoDate }} is after {{ $input.since }}, type Date-Time.

Common issues

• The output is “Invalid Date” or empty. The incoming value is not a date the browser understands. Use an ISO date such as 2026-03-01.
• The month result lands in the wrong month. Subtracting months from the 29th to the 31st can roll forward into the next month. Round the date down to month first with Round a Date when you only care about the month.
• The new date is missing after the node. With Include input fields on, an incoming field with the same name as Output field name replaces the result. Use a different name.

Related nodes

• Add To A Date: move a date forward.
• Round a Date: snap to the start of a day or month.
• Get Current Date: start from “now”.
• Filter: keep items newer than the computed date.