It is a system date, has nothing to do with your application. Please, ignore things like GU in general too(unless something actually changes within GCKey) - they are meaningless. The system update date has been clarified by IRCC in a tweet too, but somehow the forum keeps making it a real thing. I'm not accosting you, just confused on who keeps peddling this fake info here and how to best deal with it as it gets annoying for applicants who believe in those as a real events and only get disappointed in the longer term.
Our lawyer OG of this forum wrote this long time back, but still applies when it comes to sense checks:
https://www.canadavisa.com/canada-i...-you-legalfalcon.408185/page-347#post-6636032 We still don't have more stages beyond the ones LegalFalcon has listed ages ago.