Can we use ON instad of FOR?

[Lipezk]

English Language Tests, Intermediate level

ESL/EFL Test #203 "Prepositions of Time and Date (1)", question 9

I don't have any plans ......... Thanksgiving Day because my entire family lives overseas.

(a) for
(b) in
(c) about

English Language Tests, Intermediate level

ESL/EFL Test #203 "Prepositions of Time and Date (1)", answer 9

I don't have any plans for Thanksgiving Day because my entire family lives overseas.

Correct answer: (a) for

Your answer was: incorrect
I don't have any plans in Thanksgiving Day because my entire family lives overseas.
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Can we use on instead of for?
and what is the meaning of "for" in thiis sentence?

Lipezk

[Mister Micawber]

.
Here you could use on, thus specifying the date. For here is used "in the most general sense, indicating that in consideration of, in view of, or with reference to, which anything is done or takes place.'
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber