Why are Pivot Points now updating differently?

For the past 2 days, my pivot points have been updating unusually and I’m trying to understand why. Normally it would update at 7PM EST but now it updates at 7PM and again at 8PM. Does anyone know the reasoning?

FYI: My pivot points are set at 4 hour interval with the (H+L+C+O)/4 formula.

Probably because of daylight saving times when the London session opens 1 hr later, and NY will also change opening this month sometime.

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You’re right. I was not aware London ends daylight savings a week earlier than the US.

Thank you for the answer.