Will organize/is organising/ is going to organize/has organized

Which of the following verb forms are correct? The following are short notices. Can I use the following tenses interchangeably in an exam.

1 – This is to inform all the students that our school has organized/is organising/will organise/is going to organise a dance programme from 15 February, 2021 to 18 February 2021.

2- This is to inform all the students that our school is going to celebrate/will celebrate/is celebrating Mahatma Gandhi’s birthday at the school ground on 2nd october this year.