Incidents and advisories arising during the sustained solar presence period, classified under the Lapland Luminescence Charter as a Category 4 Atmospheric Utility Event. The sun does not set over Rovaniemi between approximately 17 May and 27 July. Entity activity during this period is atypically elevated. Visitors experiencing difficulty distinguishing night from day are advised to report to the Municipal Visitor Reorientation Suite. See also: Form SL-4, solar fugue.