Hello,
1) While there is no guidelines or strict rules laid down in CCS conduct rules regarding compulsory attendance in office that the office in charge can issue, it may be done to ensure attendance for the observance of the special occasion in an official manner.
2) However the CCS conduct rules state: "The office hours are from 9.00 a.m. to 5.30 P.M. with half an hour
interval for lunch from 1.00 p.m. to 1.30 p.m. for five days in a week from
Monday to Friday. These are the ordinary hours of attendance; but when any
one is required in the interest of public service to work beyond office hours or
on holidays, it must be done as a part of his regular duties. Whenever it is
considered necessary, Officers of the rank of AAO/SO/Supervisor and above
may direct the attendance of any subordinate to work upto late hours or on
holidays."
3) Therefore in the interest of public service attendance can be demanded on holidays as well. Of course this may be compensated with a leave or additional payment for the day's work or as the case may be.
4) Therefore it would be advisable to give a 'satisfactory' reply to satisfy the office-in-charge.