• say gig,
• xay gig,
• cay gig,
• fay gig,
• ray gig,
• eay gig,
• dzy gig,
• dsy gig,
• dwy gig,
• dqy gig,
• dat gig,
• dag gig,
• dah gig,
• dau gig,
• da7 gig,
• da6 gig,
• day fig,
• day vig,
• day big,
• day hig

The adjective form of the phrase "day gig" is "daytime".

The plural form of "day gig" is "day gigs"

The singular form of the word "day gig" is "day gig". The word "day gig" is already the singular form, referring to a single job or occupation undertaken during the day.