This series confuses me Okay, I really — Ender's Game Q&A

The other books tell Ender's story after Ender's Game Ender's Game is a related This is documented nicely at wikiOrson_S

Later books such as the Formic Wars and Shadows series books did have references to the Gregorian calendar According to the Ender's Game Wiki:

poki games candy crush Young Ender Wiggin is recruited by the International Military to lead the fight against the Formics, an insectoid alien race who had previously tried to invade

raja big small game Ender's Game is the most famous novel of Orson Scott Card The book originated as a science fiction novelette in Analog magazine