Jim Al-Khalili

On Time: The Physics That Makes the Universe Tick

Saturday 28 November 2026, 1pm – Castle Marquee

Does time have a beginning or an end? Is it even a real thing? Spend what we call an hour unravelling one of the greatest unsolved mysteries of science with quantum physicist and BBC science presenter Jim Al-Khalili.

He shares fresh insights into some of the most complex and profound questions in science, changing the way you think not just about the passage of time, but your place within it.

Price: £20.00

Booking is now open to Hay Festival Membership+ and Circle members. Please sign in to access your account or become a member to book now.

Booking for all other Members opens at 12pm on Wednesday 23 September.

General booking opens at 12pm on Saturday 26 September.

Talk