Verse 1
John 2:1
Third day -- after the call of Philip and Nathanael.
Cana in Galilee -- was not a very well-known place. It is mentioned only here, in John 4:46, and John 21:2. Located about 8 miles north of Nazareth.
Mother of Jesus -- Never named by John. She probably had some part as hostess, cf. v.5, where she gives directions to the servants.
She "was there" whereas Jesus and his disciples were invited. Also note in v.12 where the family all seem to go from Cana to Capernaum, so apparently the brothers (and sisters?) of Jesus were at this wedding.