Hey September - Why so Blue?

A change in routine can bring difficult feelings, but feeling unsettled in September is not enough to diagnose seasonal affective disorder. This article offers general context and a way to seek reliable help.

Separate everyday stress from a health condition

The US National Institute of Mental Health describes seasonal affective disorder as depression with a recurring seasonal pattern. It distinguishes this from stress connected with predictable school, work or holiday schedules.

If mood changes are significant, persistent or affect daily life, speak with a healthcare professional. Assessment and treatment should reflect your individual situation; a short article cannot diagnose the cause.

NIMH: Seasonal Affective Disorder

Review practical pressures

Consider writing down upcoming commitments, travel and time you want to protect. Discuss manageable changes with the people involved. A planner or a conversation may help organize responsibilities, but neither should be presented as a treatment for depression.

Get individual advice

Do not use this article to decide on sunlight exposure, vitamin D supplements or another treatment. NIMH recommends discussing treatment options with a healthcare professional and notes that vitamin D treatment studies have had mixed results.

Editorial correction, October 19, 2026: removed the simplified explanation of SAD and advice to seek as much sunlight or vitamin D as possible. Added a reliable source and distinguished routine-related stress from a clinical condition. Original publication date and address are retained.