From the graduate awards office
I think this is to cover for cases where NSERC has incorrect applicant emails registered. This happened to some people last year and it took a bit longer for them to get their results.
UofT just sent out an email saying "The results of the 2022-23 NSERC Doctoral Scholarships (PGSD and CGSD) will soon be released to all applicants via a secure site" without any specific time. Hopefully it still is 5 PM