what does this mean in Japanese きのう は げっよび でしたか?

does it mean what did you do yesterday on Monday? or something like that

2016-11-21T10:53:47Z

actually i think it means
was yesterday Monday?

Tanuki2016-11-21T11:11:43Z

Yes. It means "Was yesterday Monday?", but it's written wrong. It's not "げっよび". It should be "げつよび".. not little "つ" (or sokuon).