__ Day; Comic Relief Fundraising Event
Question is: __ Day; Comic Relief Fundraising Event
and the answer is: REDNOSE
Word Meaning:
RED — (countable and uncountable) The colour of the setting sun, blood, and strawberries; the colour which is evoked by the longest visible wavelengths (between about 625–740 nm), and a primary additive colour.
Definitions from Wiktionary.