Yes, you can do this by two ways as:
1. Class Teacher can go to Attendance tab, select “History” tab and select specific date you want to modify.
2. Goto --> “Class Registers” --> “Attendance”. Select specific date and modify it.
3. Click on Attendance icon in HEADER, select specific class and date you want to EDIT attendance.
4. Goto --> “DASHBOARD” --> “Attendance” section,
a. Click on a specific class you want to EDIT.
b. Change the date, you want Attendance to be edited.