# Time Units in dateArithmetic

**URL:** <https://forum.inductiveautomation.com/t/time-units-in-datearithmetic/107631>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [June 20, 2025, 4:54pm UTC](https://forum.inductiveautomation.com/t/time-units-in-datearithmetic/107631 "2025-06-20T16:54:28Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [June 20, 2025, 5:22pm UTC](https://forum.inductiveautomation.com/t/time-units-in-datearithmetic/107631/2 "2025-06-20T17:22:10Z")

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Hi, mmaline, and welcome to the forum. Please see [Wiki - how to post code on this forum](https://forum.inductiveautomation.com/t/wiki-how-to-post-code-on-this-forum/77831). You can post a screenshot too if it provides context.

Note that Expression Language ignores multiple whitespace and line breaks (unlike Python / Jython) so you can wrap and indent the expression to make it more readable. You can also resize the window. (You've cropped the code.)

It might help spot an error if you copy the dropdown's `options` properties and paste that too, formatting in the same way.

Also, be aware of the `now()` expression function syntax.

```python
now() // retriggers at the default tag group rate (typically 1000 ms).
now(0) // is evaluated once. This could be part of your problem.
now(1234) // is evaluated every 1.234 s.

```

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