# Era overlap question

**URL:** https://forum.numer.ai/t/era-overlap-question/2371
**Category:** Data Science
**Created:** [March 15, 2021, 9:00am UTC](https://forum.numer.ai/t/era-overlap-question/2371 "2021-03-15T09:00:22Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![nyuton](https://yyz1.discourse-cdn.com/flex009/user_avatar/forum.numer.ai/nyuton/32/687_2.png) [@nyuton](https://forum.numer.ai/u/nyuton)
#### Post date: [March 15, 2021, 9:00am UTC](https://forum.numer.ai/t/era-overlap-question/2371/1 "2021-03-15T09:00:22Z")

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Hi,

Is it known, whether the eras in the training set are overlapping?

Is this 120 eras 10 years or 2.5 years worth of data.

Thanks

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### Author: ![wigglemuse](https://yyz1.discourse-cdn.com/flex009/user_avatar/forum.numer.ai/wigglemuse/32/3094_2.png) [@wigglemuse](https://forum.numer.ai/u/wigglemuse)
#### Post date: [March 15, 2021, 2:48pm UTC](https://forum.numer.ai/t/era-overlap-question/2371/2 "2021-03-15T14:48:48Z")

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Training & validation eras are non-overlapping – each era is roughly a month. (test & live are overlapping)