Observed every year on 21 March, Cluster Headache Awareness Day is on the day of the equinox - "Cluster headache has a strong biorhythmicity, therefore cluster headache patients know this date from which on daytime in Europe will be longer than nighttime which is a relief for at least some sufferers".
The Journal of Headache and Pain is joining the campaign with some highly influential research content to complement this year's theme, Sharing a painless future for Cluster Headache.