Moodle MAT UnB: Access, Deadlines, and Backup for 2026.2

Moodle MAT UnB has resurfaced among Brazil's trending searches for a very concrete reason: classes for the 2026.2 semester at the University of Brasília began on 10 August 2026, and thousands of students have been hunting for their virtual classrooms. In this guide, I've gathered what each environment is, which deadlines are still open this week, and — for those managing education — what UnB's operation teaches any institution running Moodle.

TL;DR

• Moodle MAT UnB (moodle.mat.unb.br) is the Mathematics Department's own instance. The university's institutional environment is Aprender 3, maintained by CEAD.
• 2026.2 classes started on 10/08/2026. Extraordinary enrolment and course withdrawal run until 14/08/2026.
• On 31/08/2026, CEAD will permanently remove 2024/2 and earlier virtual classrooms from Aprender 3. Backup is the teacher's responsibility.
• Aprender 2 and Aprender 3 run Moodle 4.5 LTS since the August 2025 maintenance. Security support for this version ends on 4 October 2027.
• Tested on 13/08/2026: the http:// address of the department's Moodle returns a 404 error. Only the https:// version responds — a detail that trips many people up on the first click.

Why searches for Moodle MAT UnB spiked this week

It's no mystery: it's the calendar. According to the 2026.2 Undergraduate Academic Calendar, published by UnB's Academic Administration Office (SAA), the academic period opened on 22 July, but the first day of classes only fell on 10 August 2026. In between were enrolment, re-enrolment, and course adjustments.

The re-enrolment results were released by 12:00 on 6 August. Extraordinary enrolment — that final scramble for a spot in a full class — opened on 7 August and closes on 14 August. It's exactly the window when students' schedules change daily. Every class change means a new virtual classroom to find, and that's when the term Moodle MAT UnB enters Google.

Add to that the classic start-of-semester behaviour: students don't bookmark the environment URL; they remember the course name. When they need the Calculus 1 exercise list, they type the department name along with "moodle" and trust the search engine to sort it out. If the institution hasn't looked after its addresses, redirects, and page titles, the search engine delivers a dead link.

Moodle MAT UnB and Aprender 3: two environments, different roles

The most common confusion is thinking there's a single Moodle at UnB. There are at least three active environments, and they don't talk to each other.

Aprender 3 — the institutional environment

Aprender 3 is the official virtual learning environment for undergraduate and postgraduate courses, operated by the Centre for Distance Education (CEAD). It hosts classrooms created from SIGAA course groups, institutional announcements, and the Teacher Help Space. There's also Aprender 2, the previous generation, which remains online for legacy content.

Moodle MAT UnB — the department's instance

The Mathematics Department maintains a separate installation, linked from its own website. It's an independent Moodle with its own theme and user base. Moodle MAT UnB runs on Apache on Debian, on infrastructure separate from the institutional environment. Teachers often use such instances for course materials that span semesters, exercise lists, tutoring, olympiads, and extension projects — content that doesn't fit neatly into the central environment's classroom creation and deletion cycle.

In practice, UnB students need to know which environment an activity belongs to. If a teacher mentions "the course Moodle" without specifying which one, the answer is almost always in the teaching plan — it's worth checking both, because Aprender 3 and Moodle MAT UnB use independent logins and course lists. And if the 2026.2 classroom hasn't appeared in Aprender 3 yet, it's because the teacher needs to request it — the request window for creating semester classrooms opened on 27 July 2026.

2026.2 calendar: the dates that matter for your course

It's worth keeping the table below. All dates come from the official SAA calendar for the second semester of 2026.

Event	Date	Why it matters
First academic day	22/07/2026	Opens the administrative semester (not the start of classes)
Re-enrolment results	06/08/2026, by 12:00	Determines the schedule that generates virtual classrooms
First day of classes	10/08/2026	The milestone that triggers the search for classrooms
Extraordinary enrolment	07/08 to 14/08/2026	Last chance to join a class with vacancies
Course withdrawal	07/08 to 14/08/2026	Leave a class without failing due to absence
Deletion of old classrooms	31/08/2026	2024/2 and earlier classrooms disappear from Aprender 3
25% / 50% / 75% of semester	09/09, 09/10 and 12/11/2026	Reference for suspension and assessment
Last day of classes	14/12/2026	Closes the 2026.2 teaching calendar

Notice the gap between 22/07 and 10/08. That's nearly three weeks when the academic system is active but the virtual classroom isn't. This mismatch is normal in a federal university, but it explains a large share of support tickets in early August.

The technical detail that breaks access to Moodle MAT UnB

Here's the part that matters to platform administrators. I tested the Moodle MAT UnB addresses on 13 August 2026, from outside the university network, and here's what happened:

• https://moodle.mat.unb.br responds normally, with the Moodle homepage loading the theme and login.
• http://moodle.mat.unb.br — the same address without the "s" — returns 404 Not Found from Apache, not a redirect to the secure version.

It's a small configuration flaw with a big impact. A user who types the domain in the address bar, or clicks an old link saved in a PDF teaching plan, lands on a bare error page and concludes the environment is down. Nobody thinks "the s is missing."

How to fix it in any Moodle installation

There are three adjustments, and none takes more than an afternoon:

1. Permanent 301 redirect from port 80 to HTTPS in the virtual host, covering all paths, not just the root.
2. HSTS header (Strict-Transport-Security) so the browser uses HTTPS on its own on subsequent visits.
3. Correct canonical URL in the $CFG->wwwroot variable in config.php, always with https. Divergence here causes lost sessions, duplicate cookies, and token errors in the mobile app.

It's also worth reviewing the links published on the department's website — as is the case with the Moodle MAT UnB link published on mat.unb.br without HTTPS. An address pointing to http:// on an institutional page ages poorly and, from an SEO perspective, splits the domain's signal between two versions.

31 August: 2024/2 classrooms will be deleted

The notice is posted on the Aprender 3 forum and deserves extra attention from teachers: on 31 August 2026, virtual classrooms from semester 2024/2 and all earlier periods will be permanently removed. CEAD's justification is operational — to free up space for current periods and keep the environment healthy.

The same notice had already asked teachers to back up 2026/1 classrooms, which were hidden from students on 27 July. In other words: the responsibility for archiving your material is yours, not the institution's. If you teach the same course in 2027 and were counting on the history there, you need to act before the end of the month. The rule applies to Aprender 3: independent instances like Moodle MAT UnB follow their own retention policy, defined by the department that maintains them.

Backing up a virtual classroom, step by step

1. Log in as a teacher and open the More menu → Course reuse → Backup.
2. On the first screen, decide whether to include user data. Without user data, the file is much smaller and avoids taking personal information out of the environment — that's the right option in most cases.
3. Review the activity selection. Very large forums and heavy question banks can exceed the server's execution time limit.
4. Confirm and download the generated .mbz file. Store it in cloud storage with versioning, not just on your laptop.
5. Test the restore in an empty course before trusting the file. A backup that's never been restored is a hypothesis, not a guarantee.

If in doubt, the right channel is the CEAD Support Centre. And if the classroom has many videos hosted outside Moodle, check the links: a course backup doesn't include what's in an external service.

Moodle 4.5 LTS: the support clock runs for everyone

In August 2025, CEAD carried out a maintenance window to upgrade Aprender 2 and Aprender 3 to Moodle 4.5, along with the servers' operating system and database. It was the right decision: 4.5 is an LTS version with a long lifecycle. But LTS doesn't mean forever.

Version	Release	End of general support	End of security support
Moodle 4.5 (LTS)	07/10/2024	06/10/2025	04/10/2027
Moodle 5.0	14/04/2025	20/04/2026	05/10/2026
Moodle 5.1	06/10/2025	05/10/2026	April 2027 (standard cycle)
Moodle 5.2	20/04/2026	19/04/2027	October 2027 (standard cycle)
Moodle 5.3 (next LTS)	05/10/2026 (expected)	—	01/10/2029

The data comes from the official Moodle releases page. The strategic takeaway is simple: those on 4.5 today receive only security fixes and have until October 2027 to migrate. Since 5.3 arrives in October 2026 as the next LTS, with security guaranteed until 2029, the ideal planning window is between late 2026 and the first half of 2027.

Migrating Moodle isn't clicking "update." It's an inventory of third-party plugins, testing custom themes, reviewing LTI integrations, validating the mobile app, and rehearsing restoration in a mirror environment. An institution that leaves it to the last minute migrates right at the start of the semester — the worst possible time. And the calculation applies equally to departmental instances like Moodle MAT UnB — except there, the same work falls on a much smaller team.

One central VLE or several departmental Moodles?

The Moodle MAT UnB case illustrates a dilemma that appears in every university and in many private education networks. Departments and units want autonomy; central IT wants standardisation. Both sides are right.

In favour of the departmental instance:

• Real autonomy to install specific plugins — in mathematics, formula editors, automatic exercise checkers, and parameterised question banks.
• Content that survives the creation and deletion cycle of the institutional environment.
• Freedom to experiment with course formats without opening a ticket.

Against:

• Hidden maintenance cost: each instance is a server, a certificate, an update schedule, and a backup to monitor.
• Security risk concentrated where there's less IT staff. A forgotten instance on an unsupported version is an open door.
• Fragmented experience for students, who end up with two logins, two calendars, and two notification lists.
• Learning data scattered, making consolidated engagement reports impossible.

The middle ground that works best is the federated model: a single institutional environment for official courses, centralised authentication via SSO across all satellite instances, and a written retention and backup policy valid for all of them. Pedagogical autonomy preserved, risk surface controlled.

Checklist for institutions running Moodle

From the UnB case, you can extract a short list applicable to any operation, from a federal university to a technical college:

1. Redirect http to https on all subdomains and publish HSTS. It's the cheapest fix with the biggest impact on support.
2. Write your retention policy and communicate it well in advance, as CEAD did for 31 August. Silence here leads to lost material and friction with teaching staff.
3. Automate institutional backup beyond the teacher's manual backup. Automatic routine, off-server copy, and periodic restore testing.
4. Plan version migration 12 months ahead and never execute it on the eve of the semester start.
5. Treat mobile as a primary channel. Undergraduate students reach for their phones before their computers — and that's where most institutions still lose engagement.

The last item deserves a paragraph. The app solves the problem the browser doesn't: notifications that arrive without relying on email. We've already detailed how Moodle push notifications work as an engagement multiplier and why offline mode changes study behaviour for those with unstable internet. If the question is whether to use the official app or invest in your own, the comparison between Moodle Mobile and a custom app covers the cost threshold, and the advantages of a custom Moodle app help justify the project internally. For those also evaluating alternatives to the VLE, it's worth reading the Google Classroom 2026 updates.

Conclusion: what to do this week

If you're a UnB student, sort out two things today: confirm your schedule before 14 August, when extraordinary enrolment and course withdrawal close, and check which environment each teacher publishes material in — Aprender 3 or Moodle MAT UnB. Save both https addresses in your favourites and the broken-link problem disappears.

If you administer a Moodle environment, use UnB's calendar as a reminder. Do the backup before 31 August, check the redirects on your subdomains, and put the migration to the next LTS in this year's budget. I've worked with Moodle for over a decade, in critical EAD environments, and the pattern repeats: almost every start-of-semester emergency was created months earlier by a postponed configuration.

At Agathas Web, we look after exactly that layer — hosting, version upgrades, backup policies, and custom apps for institutions running Moodle. If your environment is still on 4.5 and nobody has decided when to migrate, that's the topic for the next IT meeting.