Final Answer:
The question is unclear, and it is not possible to determine a specific answer.
Step-by-step explanation:
The term "rosh chodesh for melachim" is not clear and lacks contextual information. "Rosh Chodesh" generally refers to the celebration of the new moon in the Jewish calendar, marking the beginning of a new month. However, "melachim" could refer to kings in Hebrew. The question, as it stands, is ambiguous and does not provide enough details to pinpoint a specific date or event associated with "rosh chodesh for melachim." Without additional context or clarification, it is not possible to determine a precise answer.
Conclusion:
Due to the ambiguity of the term "rosh chodesh for melachim," the question remains unclear, making it impossible to identify a specific date or event.