In this task, we ask you to write an answer to a question about when an event happened. For example, "going to school" usually happens during the day (not at 2 A.M). Note that a lot of the questions could have more than one correct answer. We only need a single most-likely answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.
One example: Sentence: Jack played basketball after school, after which he was very tired. 
Question: When did Jack play basketball?
Solution is here: 4 PM.
Explanation: This event likely happened between 3PM to 8PM. This is a good answer.

Now, solve this: Sentence: In another major paper from this era, Einstein gave a wave equation for de Broglie waves, which Einstein suggested was the Hamilton-Jacobi equation of mechanics. 
Question: What time did Einstein publish his wave equation?
Solution:
noon.