User blog comment:FairyRaven/Fairy Tail Chapter 424: Avatar, Review and Commentary/@comment-24.90.189.198-20150316160334/@comment-87.165.96.28-20150317140652

while i cant say anything about the gap between gmg and sun village, i think it is safe to assume that the grand magic games are held once a year. first thing after the timeskip are the next grand magic games, so i believe the timeskip itself was not one year but more along 9-11 months. as for froschs death, f!rogue said a year, but honestly no one actually believes he ment 356 days. i think the time reasonably covered by that would be between 7 and 19 months (the gmg are held in summer, so this would be "next year")