Which regions were carved out from Punjab in the year 1966?

Haryana and Himachal Pradesh

In 1966, the territories of today’s Haryana and Himachal Pradesh were separated from the larger Punjab state.

Formation of the 3 States:

1966: Punjab
This state was created after the merger of Patiala princely state with eight other similar states. In 1966, Hindi-speaking regions of Punjab were carved out to form the state of Haryana. The hilly and mountainous regions located in the northern part of Punjab were transferred to Himachal Pradesh.

1966: Haryana
On the basis of language, Haryana (Hindi-speaking region of east Punjab) was separated as an independent state from the state of Punjab in 1966. Chandigarh is the joint capital of Punjab and Haryana.

1971: Himachal Pradesh
It was declared as a Union Territory in 1956. In 1966 majority of the hilly regions of Punjab merged with Himachal Pradesh. On 25 January 1971, it attained full statehood and became the 18th State to be formed under Independent India.