Catfood Earth 4.00 is available for download.
The main change is that all of the images shipped with Catfood Earth have been remastered to 4K resolution. This includes NASA Blue Marble 2 monthly images (which Catfood Earth interpolates daily) and the 2016 version of Black Marble (city lights at night). The Catfood Earth clouds service has been updated to full 4K resolution as well.
Earth 4.00 also includes an update to the 2019c version of the Time Zone Database.
As well as providing desktop wallpaper and a screensaver, Catfood Earth can render frames for any time and date. To celebrate the release of 4.00 I created the 4K video below which shows all of 2019, 45 minutes per frame, 9,855 frames. You'll see the shape of the terminator change over the course of the year (I always post the seasonal changes here: Spring Equinox, Summer Solstice, Autumnal Equinox, and Winter Solstice). If you watch closely you'll also see changes in snow and ice cover and even vegetation over the course of the year.