At midnight 9th/10th of October she was taken to Hueco Mundo. She was in Hueco Mundo all day 10th. Ichigo and his friends left for Hueco Mundo night of the 10th. By early morning 11th, Grimmjow had brought her to Ichigo. The events of Invasion of Hueco Mundo and Fake Karakura Town all happened on the 11th.
Please see this for a dated timeline of Bleach current events.