Changing color on initial startup not working

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Ion2 calendar not changing color on initial startup. It is not changing color initially. Please help me, Everything seems to work fine when I change the month forward and getting backward. Can anybody tell me how to put this on stackables. Here is my full code.

Here is my whole project

https://github.com/smidhunraj/calendar

Here is my PHP script:

https://pastebin.com/raw/JA3Nw1Q1

Can anyone tell me how to host these on stackbliz