222

Core Architecture

My calendar app is a static, multi-page application with a fixed release cycle (annual deployment). It features a hard-coded UI with immutable data — the dates and layout cannot be modified without manual intervention. It's essentially a read-only interface optimized for offline-first functionality.

Key Features

Data Structure - 12-month dataset rendered as a grid-based layout with pre-populated date objects

State Management - Completely stateless; no persistent storage or sync capabilities

User Interaction - Supports reads and writes; compatible with any pen/pencil (similar to a POST request, but non-reversible)

Rendering - Raster-based output; responsive design (fits on my wall)

Accessibility - Physical accessibility for all members of my cohort

Portability - Take a picture once a month, refer to that on your phone

Performance - O(1) lookup time for any date; zero latency, zero network overhead

Technical Advantages

Zero dependencies, requires only wall space and a pen.

No API to support / learn, no loading times / lag, no version conflicts.

Guaranteed uptime. It's also compliant with most privacy standards, though it does require physical access.

Limitations

The calendar has no real-time sync, no cross-device functionality, and no undo. Annotations are permanent with an ink pen. It cannot adjust for time zones or integrate with other calendar systems. No ICS compatible export of appointment data. And unfortunately, the application will need to be replaced after just one year.

If you're interested in implementing a similar app, I can point you in the right direction...

top 22 comments
sorted by: hot top controversial new old
[-] ExLisper@lemmy.curiana.net 17 points 3 hours ago
[-] sibannac@lemmy.world 14 points 2 hours ago

If you have a magnet you can deploy it on any bare-metal.

[-] perishthethought@piefed.social 8 points 3 hours ago

I can't believe I forgot to say:

My calendar app will make the world a better place through decentralized uncompressed data parsing and sharing.

I may have just watched all six seasons of Silicon Valley.

[-] palordrolap@fedia.io 22 points 4 hours ago

Due to the omission of the year number on the grid, it's somewhat reusable too. 2037 is the next time all the dates and days of the week will match.

[-] verstra@programming.dev 6 points 3 hours ago

Ah, another oppurtunity to bring up international fixed calendar that could reuse the calendar every year!

[-] palordrolap@fedia.io 4 points 2 hours ago

I feel like proponents of that calendar might be better off giving all the months completely different names. It would avoid some of the potential confusion during the changeover. Sol could keep its name, I guess, but the rest, no.

On the other hand, that still wouldn't disambiguate numeric YYYY-MM-DD and the like.

[-] verstra@programming.dev 1 points 2 hours ago

That's a good point, months would need new names. And dates should have some other format, maybe a F prefix: FYYYY-MM-DD

[-] bleistift2@sopuli.xyz 1 points 3 hours ago

Continue waving that around if you want to get murdered by every programmer in the world simultaneously.

[-] Gork@sopuli.xyz 1 points 1 hour ago

And renters. That extra month rent gonna be real unpopular.

[-] victorz@lemmy.world 9 points 3 hours ago

Dang, these e-ink displays are getting really good these days

[-] TachyonTele@piefed.social 4 points 3 hours ago

Have you tried unpinning it, and then pinning it back in?

[-] fonix232@fedia.io 2 points 3 hours ago

And if that doesn't work, try folding and unfolding.

[-] Michal@programming.dev 2 points 2 hours ago

I like the size of the display

[-] blackn1ght@feddit.uk 3 points 3 hours ago

Do you plan on adding any + subscription features?

[-] romanticremedy@lemmy.blahaj.zone 2 points 2 hours ago

Don't forget about AI. We need AI in every part of our lives /s

[-] InternetCitizen2@lemmy.world 2 points 2 hours ago

Reasonable yearly fee that helps the developer keep maintenance

[-] einkorn@feddit.org 5 points 4 hours ago
[-] MonkderVierte@lemmy.zip 2 points 3 hours ago

I suck at handwriting, even more so at walls.

[-] resipsaloquitur@lemmy.world 1 points 3 hours ago

Bug report: shows April when it’s March.

[-] MonkderVierte@lemmy.zip 1 points 3 hours ago

Sure as hell it lags on flipping months.

[-] atomicbocks@sh.itjust.works 1 points 3 hours ago

Why is the text all blurry?

… no undo…

Have you thought about adding the erasable pen libraries?

this post was submitted on 07 Mar 2026
222 points (98.3% liked)

Programmer Humor

30224 readers
483 users here now

Welcome to Programmer Humor!

This is a place where you can post jokes, memes, humor, etc. related to programming!

For sharing awful code theres also Programming Horror.

Rules

founded 2 years ago
MODERATORS