# Date Expression in Historical Transaction

**URL:** <https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540>\
**Category:** Ignition\
**Created:** [September 11, 2025, 1:45pm UTC](https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540 "2025-09-11T13:45:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bweisenburger](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@bweisenburger](https://forum.inductiveautomation.com/u/bweisenburger)\
**Post date:** [September 11, 2025, 1:45pm UTC](https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540/1 "2025-09-11T13:45:11Z")

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I can make an expression in my historical transaction that is =now() and it assigns the current date and time. However, I would like the expression to assign the current date - 1 day. Can someone help me with this expression?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 11, 2025, 1:48pm UTC](https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540/2 "2025-09-11T13:48:12Z")

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`addDays(now(), -1)` should work?

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**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [September 11, 2025, 2:01pm UTC](https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540/3 "2025-09-11T14:01:16Z")

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> **[Date and Time | Ignition User Manual](https://docs.inductiveautomation.com/docs/8.1/appendix/expression-functions/date-and-time)**
>
> The following functions allow you to check or modify time values in expression bindings.

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<div class="post-metadata">

**Author:** ![bweisenburger](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@bweisenburger](https://forum.inductiveautomation.com/u/bweisenburger)\
**Post date:** [September 11, 2025, 2:10pm UTC](https://forum.inductiveautomation.com/t/date-expression-in-historical-transaction/110540/4 "2025-09-11T14:10:54Z")

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Works !

Thanks