Yeah, I get what kind of guy you are now.
Everyone itt note: this guy is against Wikipedia and thinks these things. This is EXACTLY WHY we need Wikipedia. He would literally be smarter if he had never used social media and had only used Wikipedia random article generator.
https://en.m.wikipedia.org/wiki/Giza_pyramid_complex
All were built during the Fourth Dynasty of the Old Kingdom of ancient Egypt, between c. 2600 – c. 2500 BC
The Giza pyramid complex consists of the Great Pyramid (also known as the Pyramid of Cheops or Khufu and constructed c. 2580 – c. 2560 BC)
Tell me, what does the "c." before those dates mean? It's pretty explicitly an estimate. Have you ever bothered to click their source links for this info to understand why they got these dates?