---
title: "Add / Subtract Time"
description: "Local-first visual environment for building and running AI workflows. Build agents visually, deploy anywhere, privacy by design."
canonical: https://docs.nodetool.ai/nodes/lib/datetime/addsubtracttime
markdown: https://docs.nodetool.ai/nodes/lib/datetime/addsubtracttime.md
product: NodeTool
source: https://github.com/nodetool-ai/nodetool/blob/main/docs/nodes/lib/datetime/addsubtracttime.md
---

# Add / Subtract Time

**Type:** `lib.datetime.Add`

**Namespace:** `lib.datetime`

## Description

Add (or subtract, when amount is negative) a number of time units to a date.
    date, add, subtract, shift, offset

## Properties

| Property | Type | Description | Default |
|----------|------|-------------|---------|
| date | `any` | Input date. | `` |
| amount | `int` | Amount to add (use negative to subtract). | `0` |
| unit | `enum` | Unit of time. | `day` |

## Outputs

| Output | Type | Description |
|--------|------|-------------|
| iso | `str` |  |
| epoch_ms | `int` |  |
| date | `datetime` |  |

## Related Nodes

Browse other nodes in the [lib.datetime](./) namespace.