YOU SAID:

I am going to go Christmas shopping later this evening.

INTO JAPANESE

私は今晩遅くにクリスマスの買い物に行くつもりです。

BACK INTO ENGLISH

I am planning to go shopping at Christmas late tonight.

INTO JAPANESE

私は今夜遅くにクリスマスに買い物に行く予定です。

BACK INTO ENGLISH

I am going to go shopping at Christmas late tonight.

INTO JAPANESE

私は今夜遅くにクリスマスに買い物に行くつもりです。

BACK INTO ENGLISH

I am going to go shopping at Christmas late tonight.