From MaGog's logs for 13 July:

NOTE! CHANGED FILE Legend of Grimrock, downloadables, Tarball archive, English (legend_of_grimrock_1.0.0.3.tar.gz ***TO*** gog_legend_of_grimrock_1.1.0.4.tar.gz; ***TO*** gog-4; Wed, 23 Jul 2014 16:34:56 GMT ***TO*** Mon, 13 Jul 2015 15:25:23 GMT; 405,630,257 ***TO*** 404,113,461)

NOTE! REMOVED FILE Legend of Grimrock, downloadables, Linux installer, English (legend_of_grimrock_1.0.0.3.deb; ; Wed, 23 Jul 2014 16:32:47 GMT; 314,729,348)

NOTE! CHANGED Legend of Grimrock, changelog (http://www.an-ovel.com/downloads/chg/chg_1207659016.htm)
NOTE! ADD +++ Update (13.07.2015):
NOTE! ADD +++ We have updated the Linux version of Legend of Grimrock that works with Nvidia 900 series video cards.





NOTE! ADDED FILE Volgarr the Viking, downloadables, Tarball archive, English (gog_volgarr_the_viking_1.0.0.1.tar.gz; 1.034 (gog-1); Mon, 13 Jul 2015 12:42:32 GMT; 169,157,087)

NOTE! CHANGED Volgarr the Viking, changelog (http://www.an-ovel.com/downloads/chg/chg_1207659623.htm)
NOTE! ADD +++ Update (13.07.2015):
NOTE! ADD +++ We've added the Linux version of Volgarr the Viking.

NOTE! CHANGED Volgarr the Viking, os: Windows (XP, Vista, 7, 8) and Mac OS X (10.7.0 or newer) ***TO*** Windows (XP, Vista, 7, 8) and Mac OS X (10.7.0 or newer) and Linux (Ubuntu 14.04, Mint 17)

NOTE! CHANGED Volgarr the Viking, sys_req_win: Windows XP / Vista / 7 / 8, 2.0 GHz Processor, 1 GB RAM, 3D graphics card compatible with DirectX 9.0c with 256 MB VRAM, Mouse, Keyboard ***TO*** Windows XP / Vista / 7 / 8, Processor: 2.0GHz, Memory: 1 GB RAM, Graphics: 256MB OpenGL 1.3-compatible, Hard Drive: 200 MB available space

NOTE! CHANGED Volgarr the Viking, sys_req_mac: OS X 10.7.0 or later. Processor: Intel Core 2 Duo 2GHz+ Memory: 2 GB of RAM Graphics: 256 MB of video memory Recommended two-button mouse, or Apple mouse with Secondary Button / Secondary Click enabled ***TO*** OS X 10.7.0 or later, Processor: Intel 2.0GHz Dual-Core, Memory: 1 GB RAM, Graphics: 256MB OpenGL 1.3-compatible, Hard Drive: 200 MB available space

NOTE! CHANGED Volgarr the Viking, sys_req_linux: ***TO*** Ubuntu 14.04, Mint 17, Processor: 2.0GHz, Memory: 1 GB RAM, Graphics: 256MB OpenGL 1.3-compatible, Hard Drive: 200 MB available space, Requires the following packages to be installed: libc6:i386, libasound2:i386, libasound2-data:i386, libasound2-plugins:i386, libsdl2-2.0-0:i386 and dependencies, Notice: this game comes with a 32-bit binary only





NOTE! CHANGED Cosmonautica [Upcoming], rls_date: July 15, 2015 ***TO*** July 31, 2015





NOTE! CHANGED Towerfall: Ascension, file_size: 374 MB ***TO*** 376 MB

[I don't own this game, so MaGog will not be able to report any downloadable file (or changelog) changes]

WTF o_o

I could at least understand it if they went to YMD... this just seems wrong, though.

Oh, bother. =/


...Welcome back, mrkgnao! As always, the updates are very appreciated.
Probably to aid confused Americans (You know the kind that don't have passports and may never have crossed a state line or two.) who may not be aware that there even is a different way to write dates. =P

My guess is that there are two people involved. One who adds new data to the changelogs (upon patch release) and uses DMY and one who edits the existing changelogs and uses MDY.

I prefer the month to be spelled out (e.g. July 15, 2015 or 15 July 2015), just like GOG uses everywhere else (e.g. game pages, forum). Prevents confusion.

From MaGog's logs for 14 July (part 1 of 2):

NOTE! CHANGED Pax Imperia - Eminent Domain, file_size: 519 MB ***TO*** 494 MB

[I don't own this game, so MaGog will not be able to report any downloadable file (or changelog) changes]

From MaGog's logs for 14 July (part 2 of 2):

NOTE! Guild of Dungeoneering changed its ID from 1432924523 to 1432809186

[if you wishlisted the game before the change (e.g. CarrionCrow, dudetterinazor, Getcomposted, PaterAlf, RadonGOG, skimmie, xckx), you might want to do it again]





NOTE! REMOVED FILE Eador. Masters of the Broken World, downloadables, Original Game: Patch 1.6.1 (patch_eador2_2.4.0.22.exe; 1.6.0 (gog-21) to 1.6.1 (gog-22); Fri, 03 Jul 2015 10:34:13 GMT; 28,420,728)

NOTE! ADDED FILE Eador. Masters of the Broken World, downloadables, Original Game: Patch 1.6.2 (gog-23) (patch_eador2_2.4.1.23.exe; 1.6.1 (gog-22) to 1.6.2 (gog-23); Tue, 14 Jul 2015 12:45:05 GMT; 1,909,104)

NOTE! CHANGED Eador. Masters of the Broken World, changelog (http://www.an-ovel.com/downloads/chg/chg_1207659194.htm)
NOTE! ADD +++ Patch 1.6.2 (14.07.2015)
NOTE! ADD +++ Fixed:
NOTE! ADD +++ Option for choosing between heroes to transfer to the next shard not working correctly.
NOTE! ADD +++ Incorrect turn count for friendly units upon clicking on enemies outside their attack range.





NOTE! CHANGED FILE Terraria, downloadables, Windows installer, English+French+German+Italian+Spanish (setup_terraria_2.3.0.5.exe ***TO*** setup_terraria_2.4.0.6.exe; 1.3.0.4 (gog-5) ***TO*** 1.3.0.5 (gog-6); Fri, 10 Jul 2015 10:45:53 GMT ***TO*** Tue, 14 Jul 2015 10:57:01 GMT; 139,550,800 ***TO*** 139,558,768)

NOTE! CHANGED Terraria, changelog (http://www.an-ovel.com/downloads/chg/chg_1207665503.htm)
NOTE! ADD +++ Patch 1.3.0.5 (14.07.2015):
NOTE! ADD +++ Changes:
NOTE! ADD +++ Living leaf walls now count as safe for housing!
NOTE! ADD +++ Buffed Phantasm a bit (it really was bugged!)
NOTE! ADD +++ Martian drone rarity lowered in sky biome (Still higher than original) , now shows up on rare creature finder info
NOTE! ADD +++ Vortex and Nebula weapons have been rebalanced to fit some bug fixes they went through
NOTE! ADD +++ Added Celestial Sigil, a summoning item for the final boss (craftable)
NOTE! ADD +++ Portal gun bolt speed quadrupled so you can no longer travel faster than your bolt
NOTE! ADD +++ Eater of Worlds expert mode vile spit damage nerfed heavily
NOTE! ADD +++ Damage from hurting tiles now has checks for immunity separately from other effects
NOTE! ADD +++
NOTE! ADD +++ New config options:
NOTE! ADD +++ Added Config.json setting "ReverseUpDownForArmorSetBonuses", off by default, if you set it on: stardust and vortex armors will use the UP key instead of DOWN key to trigger set bonuses.
NOTE! ADD +++
NOTE! ADD +++ Fixes:
NOTE! ADD +++ Fixed Quickstack to all chests not updating recipes list
NOTE! ADD +++ Fixed "Distorted" debuff freezing players in place rather than changing their movement pattern (sorry!)
NOTE! ADD +++ Fixed Cute Fishron and Unicorn mounts not having their tooltips
NOTE! ADD +++ Fixed 1.3.0.3 and earlier versions of worlds not loading successfully under certain circumstances (sorry! again!)
NOTE! ADD +++ Fixed issue where you could use items when hovering between the item slots on the bottom row of the inventory
NOTE! ADD +++ Fixed issue where Drill Containment Unit's mining code would cause unnecessary lag in multiplayer
NOTE! ADD +++ Fixed Cultists ritual blocking Martian Probe from spawning
NOTE! ADD +++ Fixed Stardust Dragon desync issue
NOTE! ADD +++ Fixed solar tablet being usable in pre-hardmode, night time or during a solar eclipse under rare circumstances
NOTE! ADD +++ Fixed some banner names
NOTE! ADD +++ Fixed dryad's ward buff reducing npc defense instead of buffing it (and npcs having dryads ward defense when they dont have the buff)
NOTE! ADD +++ Fixed (super rare) bug where hittable projectiles showed HP on mouse hover
NOTE! ADD +++ Fixed portal gun's portals not allowing players to teleport to spots near nonsolid platforms
NOTE! ADD +++ Fixed Cosmic Car shadow trail glows not fading
NOTE! ADD +++ Fixed hades/lokis dyes causing strange behaviors
NOTE! ADD +++ Fixed some oddities about portal gates
NOTE! ADD +++ Fixed a rare lighting crash
NOTE! ADD +++ Fixed goblin scouts dispawning not spawning (or rather, despawning super fast)
NOTE! ADD +++ Fixed vortex weapons not scaling with ranged damage or knockback (or stealth, or anything, sorry!)
NOTE! ADD +++ Fixed bug that let you quick stack coins that were not in coin slot or hotbar to other chests
NOTE! ADD +++ Fixed bug where holding pet items would not bring up the equipment page
NOTE! ADD +++ Fixed torch dupe bug
NOTE! ADD +++ Fixed all the spider hitboxes when on walls
NOTE! ADD +++ Fixed chests which turn into big mimics on multiplayer would no longer allow destroying another chest that would be placed in their position
NOTE! ADD +++ Fixed 'final boss flies to space' bug
NOTE! ADD +++ Fixed Seedler projectiles not counting as melee / not getting flask effects
NOTE! ADD +++ Fixed hoplite enemy javelins showing flask visual effects in singleplayer
NOTE! ADD +++ Fixed issue where WoF's 'The Hungry''s ropes would turn invisible
NOTE! ADD +++ Fixed Lunar Hook not allowing you to use the hooks freely unless at least 1 is placed
NOTE! ADD +++ Fixed being able to open money trough when the game is paused

Probably as a result of our discussion, the Sanctuary RPG changelog has been modified a few hours ago to be DMY throughout. I wonder what will happen now to the other changelogs, most of which are now already MDY.

Dammit GOG, YYYY-MM-DD. Everyone views that the same.

They should just change them to YYYY-MM-DD (ISO 8601 international standard) and stick with that.

It has the added benefit that it's an unambiguous formatting. No other date format in the world uses that 4-2-2 layout separated by dashes.

They will go YYMMDDYY, or maybe YMDYDYMY, or they will switch to galatic dates, or, or...
*sigh*

From MaGog's logs for 15 July:

NOTE! CHANGED FILE Mount & Blade: Warband, downloadables, Original Game: Windows installer, English (setup_mount_and_blade_warband_2.2.0.10.exe ***TO*** setup_mount_and_blade_warband_2.3.0.12.exe; ***TO*** 1.167 (gog-12); Fri, 23 Jan 2015 11:30:28 GMT ***TO*** Wed, 15 Jul 2015 09:39:52 GMT; 650,991,288 ***TO*** 650,953,992)

NOTE! REMOVED FILE Mount & Blade: Warband, downloadables, Original Game: Patch 1.166 (patch_mount_and_blade_warband_2.2.0.10.exe; ; Fri, 23 Jan 2015 11:30:54 GMT; 20,499,576)

NOTE! REMOVED FILE Mount & Blade: Warband, downloadables, Original Game: Patch 1.167 (patch_mount_and_blade_warband_2.2.1.11.exe; ; Fri, 10 Apr 2015 10:25:06 GMT; 3,511,888)

NOTE! ADDED FILE Mount & Blade: Warband, downloadables, Original Game: Hungarian and Turkish language fix (patch_mount_and_blade_warband_2.3.0.12.exe; 1.167 (gog-12); Wed, 15 Jul 2015 09:34:51 GMT; 14,479,016)

NOTE! CHANGED Mount & Blade: Warband, changelog (http://www.an-ovel.com/downloads/chg/chg_1207666913.htm)
NOTE! ADD +++ Update (15.07.2015):
NOTE! ADD +++ We have updated the main installer for Mount & Blade: Warband as well as added a path that fixes issues with the Turkish and Hungarian languages not displaying properly.

[No flag]





NOTE! CHANGED Desktop Dungeons Enhanced Edition, os: Windows (XP, Vista, 7, 8) ***TO*** Windows (XP, Vista, 7, 8) and Mac OS X (10.7.0 or newer) and Linux (Ubuntu 14.04, Mint 17)

NOTE! CHANGED Hotline Miami 2: Wrong Number, os: Windows (XP, Vista, 7, 8) ***TO*** Windows (XP, Vista, 7, 8) and Mac OS X (10.7.0 or newer) and Linux (Ubuntu 14.04, Mint 17)

[GOG game page bug fixes]





NOTE! CHANGED Guild of Dungeoneering, os: Windows (XP, Vista, 7, 8) ***TO*** Windows (XP, Vista, 7, 8) and Mac OS X (10.7.5 or newer)

NOTE! CHANGED Guild of Dungeoneering, sys_req_mac: ***TO*** OS X 10.7.5 or later, Memory: 2 GB RAM, Hard Drive: 3 GB available space, Recommended system requirements: OS X 10.7.5 or later, Memory: 4 GB RAM, Hard Drive: 6 GB available space

NOTE! CHANGED Guild of Dungeoneering, compatibility: The Mac version will be available soon. ***TO***

NOTE! CHANGED Guild of Dungeoneering, file_size: 180 MB ***TO*** 290 MB

[I don't own this game, so MaGog will not be able to report any downloadable file (or changelog) changes]





NOTE! CHANGED Caribbean!, file_size: 0.9 GB ***TO*** 1.1 GB

[I don't own this game, so MaGog will not be able to report any downloadable file (or changelog) changes]





NOTE! CHANGED Odallus: The Dark Call, bonuses: ***TO*** manual, wallpaper, avatar, poster

NOTE! CHANGED Odallus: The Dark Call, compatibility: http://joymasher.com/privacy-policy/ ***TO*** Odallus: The Dark Call fully supports the Xbox 360 controller. http://joymasher.com/privacy-policy/

From MaGog's logs for 16 July:

NOTE! CHANGED Odallus: The Dark Call, sys_req_win: Windows Vista / 7 / 8, Processor: 1.0 GHz Processor, Memory: 1 GB RAM, Graphics: 64MB VRAM Integrated Graphics Card, DirectX: Version 8.0, Hard Drive: 100 MB available space ***TO*** Windows Vista / 7 / 8, Processor: Intel Core 2 Duo 2.1ghz or equivalent, Memory: 2 GB RAM, Graphics: 256MB VRAM Dedicated Graphics Card, DirectX: Version 9.0, Hard Drive: 100 MB available space

I really hate silent updates. Thanks for reporting it!