The maintenance is actually scheduled on 20th June 2020, 0500-1200 GMT, and not 13th June 2020. I apologise for the mistake.

From: CCEDOWNLOAD
Sent: Tuesday, June 9, 2020 10:22 PM
To: arch-mirrors-announce@lists.archlinux.org <arch-mirrors-announce@lists.archlinux.org>; alpine-mirrors@alpinelinux.org <alpine-mirrors@alpinelinux.org>; team@blackarch.org <team@blackarch.org>; centos-mirror@centos.org <centos-mirror@centos.org>; ctan@ctan.org <ctan@ctan.org>; Linux Mint <root@linuxmint.com>; admin@opensuse.org <admin@opensuse.org>; Slackware Mirror Admin <mirrors@slackware.com>; mirrors@ubuntu.com <mirrors@ubuntu.com>
Subject: download.nus.edu.sg downtime on 13 Jun 0500-1200 GMT

Dear All,

Our server will be undergoing a maintenance on 13th June 2020, 0500-1200 GMT. We would like to apologise for any inconvenience caused.

Regards,

Derrick Chua

download@nus