No prizes for guessing what this new UWP app does - but you'd be surprised how polished it is. Taking the premise of counting you down to birthdays, holidays, and the like, the experience is sumptuous and what I'd have guessed would be a novelty turns out to be something of a must-have freebie for anyone running Windows 10 Mobile (or indeed Windows 10 on their Surface Pro etc.) OK, there's a big quirk, but I'm sure it'll be fixed soon enough...

From the Store description:

Special Day Countdown is the new app that lets you track and remember your events in a simple and fast!

Available on PCs, Tablets and Smartphones, it indicates missed/past days from a particular event. - Select the background image directly from your smartphone gallery or from the images collection available in the app and share the event with your Facebook friends!

You can also set up a customized Live Tile for each event along with a daily, weekly or monthly notification!

The only odd thing about this application is the reference above to 'missed/past days' - and indeed the countdown timers are all expressed in negative numbers. Why would anyone care how many days it has been since (e.g.) your birthday last month or your summer fayre back in July? Surely it's vastly more likely that you'll be counting down the days to something. Which is why the application's name is the takeaway and focus here, not the Store description!!

Here is Special Day Countdown UWP in action on my Lumia 950 XL:

Special Day Countdown appears basic at first glance, but it quickly becomes more polished as you add content and backgrounds. Here you can choose a theme and language (though only English or Italian at present). I didn't try the Facebook sharing.

Setting up a new event involves giving it a title and date, obviously, along with a background. 10 or so examples are included in a carousel, which is very helpful in getting started.

The application lets you scroll through all the various countdowns you have set-up, as shown - tapping on any individual countdown shows it full-screen, as shown above, right. Note the 'pin to start' control that is now available.

Pinning countdown timers to your Start screen shows them with backgrounds and correct stats. Though - again - there's the crazy obsession with using negative numbers. I'm sure this will be fixed in the next version!

You can download Special Day Countdown completely free here in the Store. The numbering will be sorted soon, once the developer sees this mini-review, I'll be bound!