Hi Zuber,
In the system we can say that when Ramadan month will start and end. So for that reason you can do like below
1. Create two time types and use that two type in IT2012 for the Ramadan start date and end date.
2. Now when you will get the Time Type X from IT2012 then you will keep value 1 on the time type through out the month if you will not get the another Time Type Y value from IT2012. If Y present then cancel the X value transfer to next day. Through PCR you will control this.
3. If employee works on the Weekly Off or Public Holiday with comparison that current day time type X is present or not. If it's present then system can understand that system will generate WTX for W/OFF and WTY for Public Holiday. On the another month's for this two day's you will create WT M and WT N.
4. In the wage type valuation you will use 125% for WT X for basic pay and 150% for WTY. You can this calculation through custom PCR in payroll schema.
Hope so you got the system design.
Regards,
Sankarsan