What is the ruling on wages earned from maintenance work on a holiday: are they for me alone or for me and my partner, and how do I expiate for what has passed if the ruling is for the latter?

If a holiday is not included in the contract between two partners, then whatever work one of them performs on that day and whatever money he earns from it is his right alone, and the other partner has no claim to it. The partnership between them is considered a partnership of labor or professions (sharikat a'mal or abdan), which is permissible according to the majority of jurists.