In my opinion, the first day of #TellenTotDixSept starts far too early. There's no time for extra photos of Namur station at 5:03. However, it is the only day with a weekday timetable and no disruptions in Brussels, so I have to collect lots of weekday-only curves today. Yes, lines and curves both count if there are passenger trains on them. The nine-coach IC from Namur to La Louvière is almost empty.

At La Louvière-Sud, it is time for the first 'first time' on this trip: The curve connecting infrastructure lines 116 at La Louvière and 117 at Manage. I have to get off at Manage, even though this S62 service would run further on untravelled railway lines. It is a short ride through the pitch-dark morning with a few other overtired passengers in this #SNCB Class 41 DMU.
🧮 First trips: 1️⃣ #TellenTotDixSept

After a two-minute connection in Manage, I board the first Desiro of this trip. I's one of three P trains between Manage and Braine-le-Comte. These trains are the only ones using the direct line 117 between Manage and Familleureux. For a peak hour, there aren't many passengers. At Braine-le-Comte, they transfer from our P train to the corresponding P train to Brussels. I assume the Desiro is running back to Manage empty in order to serve the same line again.
🧮 First trips: 2️⃣ #TellenTotDixSept

Diving goggles! 😍 They are known as NMBS Class 86 EMUs and are not that common. The S7 and S9 services, which bypass the Brussels north-south connection, are always a good bet. Of course, the rolling stock is not the reason for taking this train today. The S7 is the only line that passes through Brussels without running via Schuman and Luxembourg. These services only run on weekdays. I still missed the Arcaden–Delta segment of line 26.
🧮 First trips: 3️⃣ #TellenTotDixSept

As the Intercity from Bordet to the airport has been cancelled, I need to change my plans. After heading back to Brussels, it's time for a different route: On weekdays, IC line 14 runs from Brussels to Aarschot, bypassing Leuven via a single-track viaduct. A typical M7 Intercity service takes me to Aarschot.
🧮 First trips: 4️⃣ #TellenTotDixSept

A little while later, I'm back at Bordet again. Here, I can finally board an IC train to the airport. The airport can be accessed from both the northwest (line 36C/2) and the south (line 36C), so I don't yet know which way the train will go. Unfortunately, it turns out to be the south, which I have already done. #TellenTotDixSept

The advantage is that I had planned a fallback solution. The IC trains of line 17 become an S19 service at the airport heading back to Bordet. There is no change of direction, so the train runs a loop (unlike my simplified Belgium diagram shows). Leaving the airport north-west and using the connecting curve to Bordet is what I still needed.
🧮 First trips: 5️⃣ #TellenTotDixSept

After changing stations, I find myself back at Brussels North. My Intercity service arrives on platform 1 — once again, it's an M7 train. Despite the cancellations, I am back on time!
I assume that my trip is getting more interesting now because I am also travelling on entirely 'new' lines from now on. The 11:30 train to Dendermonde takes me out of the Brussels suburbs. More and more greenery can be seen between the buildings. A cycle path follows the railway.
🧮 First trips: 6️⃣ #TellenTotDixSept

Travelling on new lines continues without further transfers at Dendermonde. The S34 service runs between Dendermonde and Lokeren, Sint-Niklaas and Antwerp. This is my first time travelling on the Dendermonde-Lokeren line (line 57). There will be a bus replacement service at this weekend, so I had to take this line today as well. (today: Friday)
🧮 First trips: 7️⃣ #TellenTotDixSept

I hope that my favourite Belgian train does not fulfil its dedication. 🤭
#TellenTotDixSept

Two trains later, it's time for another first time. The terminus of the L train between Bruges and the industrial area of Zeebrugge varies depending on the day of the week. I don't know any other comparable situations. At weekends and on public holidays, the train runs to Zeebrugge-Strand (line 51A). On weekdays, the terminus is Zeebrugge-Dorp (line 51A/1). I've never travelled to the latter before.
🧮 First trips: 8️⃣ #TellenTotDixSept

After travelling back to Ghent-Sint-Pieters, I have a transfer time of more than 17 minutes for the first time today. In fact, I have more than an hour. Why? Because I have to wait for the first of two daily P trains, which uses the curve from the direct Gent-Brussels line 50A to Denderleeuw at Welle. It's a Desiro again, of course. Every P-train curve is done!
🧮 First trips: 9️⃣ #TellenTotDixSept