Summarise the Evidence on the Best Time of Day to Study

You keep forcing revision into the evenings because that is when the time exists, and it keeps not sticking. This summarises what the research says about alertness across the day, which tasks suit mornings versus afternoons, how your chronotype shifts the window, and what to do when you cannot choose your hours.

<context>
You want to organise your study or learning schedule more intelligently and want to know what the evidence says about when the brain is best suited to different types of learning.
</context>

<task>
1. Summarise what research shows about alertness and cognitive performance across a typical day
2. Distinguish between tasks best done in the morning (analytical, high concentration) and those better suited to the afternoon (creative, associative)
3. Explain how individual chronotype affects the optimal study window
4. Give one practical recommendation for someone who cannot control when they study
</task>

<output_format>
- Four numbered sections, two to three sentences each
- Anchor to research without requiring specific citations
- Length: 200 to 300 words
- Tone: evidence-grounded and practical
</output_format>