What is the ruling on commemorating "Earth Day" and participating in its events, which marks the occupation's confiscation of Palestinian lands?

If the act involves warding off evil or realizing considerable benefits, then there is no harm in it. However, if it is merely for the sake of commemorating an occasion without considering the warding off of evil or the realization of benefits, then it has no legal basis, and there is a fear that it may fall under the category of adopting holidays, which is prohibited.