Doldrums

dol·drums /ˈdoʊldrəmz, ˈdɒl-, ˈdɔl-/ Pronunciation Key - Show Spelled Pronunciation[dohl-druhmz, dol-, dawl-] –noun (used with a plural verb)

1.	a state of inactivity or stagnation, as in business or art: August is a time of doldrums for many enterprises.

2.	the doldrums, a. a belt of calms and light baffling winds north of the equator between the northern and southern trade winds in the Atlantic and Pacific oceans. b. the weather prevailing in this area.

3.	a dull, listless, depressed mood; low spirits.

Cheer. Me. Up.

I think my banner would read "It will start getting lighter in the morning soon."