Either your mirror is out of sync, or your upstream is by over a month. The date in timestamp.txt is "Wed 31 May 12:24:01 UTC 2023" however if you review up-to-date mirrors (such as AARnet) it should be updating at least every 12 hours.
From: CentOS-mirror <centos-mirror-bounces@centos.org> on behalf of Parikshit Kumar Bais <parikshit.kumar@rackbank.com> Sent: Friday, June 30, 2023 5:45 PM To: centos-mirror@centos.org <centos-mirror@centos.org> Subject: [CentOS-mirror] Please add a new CentOS mirror
Hello
Greetings from RackBank !!
We would like to add our CentOS repo to the public mirror list.
The details are below. Please let me know if you have any additional information which is needed
Sync schedule: Every day
Bandwidth: 1Gbps
Location: Asia