I just finished listening to the Ender's Game audiobook and I'm currently listening to Speaker of the Dead.
It's pretty clear that the story takes place in the future but is it known when exactly? I might have missed it but I don't remember any mention of a year or something that gives a hint in what year the book begins.
The only references I recall are about in-universe events like the Second Invasion which took place some 70 to 80 years before Ender's Game. But how long before that did the First Invasion take place and when? I'm not sure if this was said in the book.
Speaker of the Dead only confused me more when when they introduced a new calendar/timeline (before and after Starways Code).
TL;DR - Is there any information in the books or other media that specifices or allows us to determine a timeline for the plot of Ender's Game? (matching the Gregorian calendar)