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Postcrossing Blog

News, updates, and all kinds of goodies and stories from the postal world!

Our friend Iris (aka scrutiny) from Hong Kong has an amazing radar for postal-themed links and projects. A while ago, she showed us these local stamps and they are so cool that we wanted to share them with you too!

Hong Kong augmented reality stamps

The stamps themselves feature historical buildings from Hong Kong, which are being revitalised as part of an ongoing campaign to “enhance public understanding and appreciation of the built heritage in Hong Kong”. But what makes them special is that when hovered with a smartphone using the HKPostStamps app, the stamps gain a whole other dimension!

Iris filmed this video to show everyone:

While not being the first use of augmented reality in philately, it’s certainly a very interesting one. Each building’s rendering includes interactive hotspots, which bring up more information when you touch them on the smartphone screen such as opening hours, website links, and photos. I think that’s pretty neat — how often do you get to hold an historical building in your hands? 😊

Thank you Iris, for taking the time to show us! And if anyone knows of other interesting philatelic issues, share them in the comments — we’re always curious about stamp innovations.


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For the second post in this series about Postcrossing’s statistics, we wanted to find out when does more postcard registering activity happen on the project. Intuitively, we know most postcrossers probably register their postcards later in the day, when they’re back home after work or school… but when exactly? And in which day of the week is most mail delivered?

To find out, Paulo chose all the postcards registered last year, adjusted their registering times to each recipient’s local timezone and then compiled the numbers, putting them together in a graph. Here is the result, showing the total number of postcards registered in each day of the week in 2017:

Postcards registered per day

As one would imagine, many more postcards are registered between Monday and Friday than on weekends. Wednesday wins by a narrow margin, with a total of almost 900,000 postcards registered! Tuesday comes as a close second, while Monday is remarkably quiet in comparison. This is to be expected though, as many postal operators stop working during the weekend, and mail is only processed after they reopen.

Predictably, Sunday is the slowest day in Postcrossing, with a total of less than half a million postcards registered. As a curiosity, did you know that 2017 had 53 Sundays and just 52 of the each of the other days? Since there are 365 days in a year, there’s always an extra day to account for… but even with that extra Sunday, things were still quiet on the last day of the weekend.

Since we had our hands in the data, we decided to find out how these totals were distributed throughout the day! To do this, we summed the number of postcards registered in each hour of each day for the whole year, and then plotted this heatmap:

Postcards registered per hour

It’s easy to spot the red frenzy of activity, right? Despite Wednesday generally being the day with the highest number of registered postcards, the registering peak actually happened on Tuesday nights last year, with a cumulative total of 75,155 postcards registered between 8 and 9pm.

In contrast, the slowest time in Postcrossing in the whole year was on Mondays between 4 and 5am, with less than 1000 postcards registered in those early Monday hours throughout the whole year.

Do these statistics reflect your experience too, or were you perhaps surprised by them? Let us know in the comments!


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Did you know your used postage stamps can save a beautiful bird from extinction? The Royal Society for the Protection of Birds (RSPB) is seeking your used postage to raise money for the protection of the albatross, a large seabird found in the Northern Pacific and Southern Ocean.

The RSPB sells the stamps to stamp dealers and auction houses, and then uses the profits raised to show the fishing community how to use techniques and tools to protect the birds from getting caught in fishing lines. There are 22 species of albatross and all of them are endangered at some level. For the birds!

While reading about albatrosses, I discovered a page on Wikipedia about the oldest bird living in the wild. She is an albatross and her name is Wisdom. She is about 66 years old! Maybe sending our used stamps to RSPB will help other birds get to live a nice long life, too.

The RSPB ask that the stamps be cut from your mail, leaving a 1/4 inch (6mm) edge around the backing. They should be sent to:

RSPB Stamps
PO Box 6198
Leighton Buzzard,
Bedfordshire LU7 9XT

I confirmed with Laura, the Community Fundraising Manager at RSPB, that the stamp drive is still ongoing. Laura was quite happy to know postcrossers would be onboard with this drive. She also mentioned in her email to me that Postcrossing looks like a lot of fun, and that she wishes she had more time to participate… Perhaps with our stamps we could include a postcard to Laura encouraging her to give it try!

PS – A big thank you to ljbeelady who suggest this post, and to postmuse who wrote about it! 😊


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March is fiiiiiinally here, and we can reveal at last how many postcards were sent for a good cause last December! Ready to find out? Here it goes…

Postcards for a good cause

Postcrossers in Germany sent a total of 86,858 postcards during December, raising €8,685.80 for Stiftung Lesen! YAY!

Congratulations to all postcrossers for making this happen! We’re forever in awe of the thousands of dedicated German senders, who save their postcard slots throughout November just to be able to send more postcards are soon as the clock strikes 12 on December 1st — and they keep at it the whole month!

And of course, all the prompt recipients are important too! Every postcard has a sender and a receiver, and they’re both part of each exchange — so congratulations to all the recipients as well.

And last but not least, a big thank you to Deutsche Post for always standing by their commitment to improving literacy in Germany, year after year. Hurray!

Paulo is going to run his magic script to choose the prize winners, and if you’re one of them, we’ll get in touch in the next few days. Keep an eye on your email to find out if you were one of them! 😊


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The writing prompts are an ongoing experiment that invites postcrossers to write about a different topic on their postcard’s messages every month. These are just suggestions though — if you already know what you want to write about, or the recipient gives you some pointers, that’s great too!

Another month will soon start and it’s time for a new suggestion for the messages on your postcards! But first, let us ask: did last month’s writing prompt help you unlock some creativity and write more on your postcards? And did you discover any new writers that you’re looking forward to read? Let us know in the comments below!

The writing prompt for March was suggested by nyassa on the forum:

In March, describe what you see out of your window.

This is such a simple prompt, but so interesting! I’m writing this post from our office, and we use our big window here as a whiteboard, to jot down ideas and things we’re working on… so it’s a bit busy! Through it, I can see the blue sky, the palm trees swaying in the wind across our quiet street, our elderly neighbours walking their elderly dogs… aaaand the postman that has just arrived on its scooter! Time to go pick the mail! 😀

We hope you enjoy this monthly prompt — feel free to take a step further, add extra details, or even draw it on your postcard!