honeymoon

noun
The period of time immediately following a marriage.
A trip taken by a newly married couple during this period.

We went to Greece for our honeymoon.
A period of goodwill at the beginning of a new term or relationship (e.g. towards a newly elected politician or in respect of a new business arrangement).

Now that the honeymoon is over, it’s time for us to get down to the business at hand.

verb
To have a honeymoon (a trip taken by a couple after wedding).

My parents honeymooned at Niagara falls.