User blog comment:Xilinoc/Ch. 545 - Blue Stripes/@comment-4794735-20130709220725/@comment-11051098-20130709225553

Mera taked about Nimaiya putting a limit on Icchigo's return home for 1 night, so half a day (+/- 12 hours) would probably be correct. Then add the time from he came back and Zangetsu was reforged.