P.S.: it's not even a question of personal preference. It's a question of scientific evidence. Even if you don't believe that most of these benefits apply to most people, you're free to bring evidence about the benefits of early-evening light exposure...

Evidence-backed benefits of morning light exposure:

Advances the circadian clock, helping shift the body's biological night earlier. Randomized controlled study: https://pubmed.ncbi.nlm.nih.gov/24179293/

Promotes earlier sleep timing and may improve subjective sleep quality. Systematic review of 45 studies: https://pubmed.ncbi.nlm.nih.gov/30670164/

Improves alertness, attention, and reaction times, although average effects are small. 2025 systematic review and meta-analysis of 150 studies involving 5,401 participants (daytime light, not exclusively morning): https://doi.org/10.1080/15502724.2025.2493669

Helps treat seasonal depression (SAD). Systematic review and network meta-analysis of 17 randomized trials involving 773 patients: https://pubmed.ncbi.nlm.nih.gov/40629637/

Can improve outcomes in nonseasonal depression when bright-light therapy is added to treatment. 2024 meta-analysis of 11 randomized trials involving 858 patients: https://pubmed.ncbi.nlm.nih.gov/39356500/

Natural daylight exposure helps synchronize the biological clock with the solar day. Experimental research found that exposure to natural light-dark cycles advanced circadian timing compared with modern indoor lighting environments: https://pubmed.ncbi.nlm.nih.gov/23910656/

Cuba is skipping its November 1, 2026 clock change and staying on DST until 2027