Should I use "day" or "date" ?
Hello, I have written 2 sentences but still wonder which one is correct:

Sentence 1: " Hitachi announced on February 22, 2019 that it had made Hitachi Capital a wholly-owned subsidiary on the same date" ( the day that Hitachi announced and the day that it made Hitachi Capital a subsidiary are the same)

Sentence 2: " Hitachi announced on February 22, 2019 that it had made Hitachi Capital a wholly-owned subsidiary on the same day" ( the day that Hitachi announced and the day that it made Hitachi Capital a subsidiary are the same)

Please explain to me which one is correct to be used here, " on the same day" or " on the same date". Or if both phrases are acceptable, which one is more preferred ?

Thanks you so much !!

Question

Should I use "day" or "date" ?
Hello, I have written 2 sentences but still wonder which one is correct:

Sentence 1: " Hitachi announced on February 22, 2019 that it had made Hitachi Capital a wholly-owned subsidiary on the same date" ( the day that Hitachi announced and the day that it made Hitachi Capital a subsidiary are the same)

Sentence 2: " Hitachi announced on February 22, 2019 that it had made Hitachi Capital a wholly-owned subsidiary on the same day" ( the day that Hitachi announced and the day that it made Hitachi Capital a subsidiary are the same)

Please explain to me which one is correct to be used here, " on the same day" or " on the same date". Or if both phrases are acceptable, which one is more preferred ?

Thanks you so much !!

Answer

They are both acceptable.  Date is a bit more formal than day.

Answer

Hello Nam,
For me , neither the first nor the second is gramatically correct. Moreover, I see no reason to use the phrase " at that date/day". I would say : 
On 22 Febuary 2019  Hitachi announced Hitachi Capital as/ to be a wholly-owned subsidiary.
I am not quite sure why you are using the adverb "wholly" and not sure if it is correctly used though.