I am wondering though are there physicists who say time is completely man made and is not real. Thought for 6s Yes — some physicists say that, but almost none mean “time is a made-up calendar like money.” They mean the flow, the global now, or time as a fundamental ingredient is not in the basic laws. Clocks, aging, and change still happen.Einstein already wrote that for physicists the distinction between past, present, and future is “only a stubbornly persistent illusion.” He meant there is no single moving present for the whole universe. He did not mean clocks are fake. physicsworld.com Julian Barbour is the blunt case. In The End of Time he argues there is no flowing time and no hidden time axis. Reality is a heap of complete “Nows.” What we call history is structure inside a Now (a “time capsule”), not travel along a line. Motion and passage are how we read differences between configurations. That is as close as a working physicist gets to “time is not real.” It is a minority view, taken seriously as a research program, not as settled fact. en.wikipedia.org Carlo Rovelli is the most visible living voice. He has written that time does not exist at the fundamental level: loop-quantum-gravity equations need no time variable; past and future look the same in microscopic laws; the “flow” is largely how a coarse-grained, heat-sensitive brain sits inside rising entropy. He also says our experience of time is not a mere error — it is real for us, like the sky “turning” because Earth rotates. So: not fundamental, not man-made from nothing, but perspectival. theguardian.com Others nearby, not identicalPage and Wootters: in a globally frozen quantum universe, “evolution” is entanglement with a clock subsystem. Nima Arkani-Hamed and many quantum-gravity / holography people: spacetime itself is probably emergent, not basic. Lee Smolin often disagrees with full timelessness and defends a real present; useful as a contrast. What almost nobody in physics claims: that seconds, cesium clocks, or “Tuesday” are arbitrary social inventions with no physical correlate. Units and calendars are human. Duration, causal order, and proper time along a worldline are not.So the accurate map is:Claim Who Status No universal flowing now Einstein, most relativists Mainstream Time not in the deepest equations Rovelli, some quantum gravity Active research Time is only an illusion; only static Nows Barbour Minority, discussed Time is a human convention like money Almost no physicist Not a physics position Your “time doesn’t exist” slogan sits nearest Barbour and popular Rovelli. The field’s careful version is: the thing we feel as a river is not a basic piece of the world; change and clocks still are.