In the Spanish version I've found the following discrepancy at Day 10:
When Gabe uses the newspaper, the narrator says "June 28" (28 de junio), but in the image of the newspaper it is writed "June 27" (27 de junio); look, please, at the linked image:
https://drive.google.com/open?id=0B_nakSX0fVysTXRCVzRRSFNCbmM (https://drive.google.com/open?id=0B_nakSX0fVysTXRCVzRRSFNCbmM)
I purchased GK20th at GOG in March, 2015. A comrade of mine has purchased the GOG-English version this year (2016), and Day 10 is June 28 on both the newspaper and the narration.
Could the discrepancy be present in the first versions and fixed in a patch at some point?