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i have used this library and noriced that hajiri data for example of today is

while it is working correct here

how can we fix this problem

please make sure from all days are the same umm alqura date
example:01-01-2019 is tuesday 25 ربيع الثاني 1440
but in this calendar is 24 not 25 so this make a confusion for user

How to adjust Date plus and minus, the date is not same for all countries
For example in Oman Current Hijri Date is
Georgian Date: 19/06/2019
Hijri Date:15 Syawwal1440

but https://zulns.github.io/Calendar.js/index.html
showing 16 syawwal, we want to minus 1, please let me know how to do so.