In case of SBI Card IPO, the cut-off date is date of filing RHP. The SBI Card DRHP Says
"Only SBI Shareholders (i.e. individuals and HUFs who are equity shareholders of SBI (excluding such other persons not eligible under applicable laws, rules, regulations and guidelines) as at the date of the Red Herring Prospectus) would be eligible to apply in this Offer under the SBI Shareholders Reservation Portion."