How do you call the new house graghapravesam function in English?

There isn't a direct English equivalent for the Hindu ceremony of "grahapravesam" or "grihapravesam," which marks the formal entry into a new home.

However, you can use these phrases to describe the event:

Formal:

* Housewarming ceremony

* New home blessing

* Inauguration of the new home

Informal:

* Moving-in ceremony

* Housewarming party

* Welcome home celebration

It's also possible to explain the significance of the ceremony by saying something like:

* "We are celebrating the traditional Hindu ceremony of grahapravesam, which marks our entry into our new home."

This will help your audience understand the specific meaning and significance of the event.