How to Select the specific Date from Calendar pop up once we click on Calendar icon?

CodeceptJS
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If you don’t have to click on it try using I.fillField() instead.

https://codecept.io/helpers/Detox/#fillfield

3

Find the day element by DOM inspector and then you can use e.g. I.click(locate(element).withText(12))
Well, actually withText its translated to XPath’s contains(). So better would be exact text match using XPath directly, e.g.: //div[text()='12']