Change in the Time of Haidh

1. The time of haidh can also change.
2. Example (1): The time of a woman’s haidh is the first 5 days of the month. This month she was clean the first 5 days, but experienced 5 days of bleeding immediately thereafter, or a while thereafter. In this case, the time of her haidh, that is the location in the month of her haidh, has changed. Previously it was at the beginning of the month, now it is later.
3. Example (2): The routine is haidh during the first 5 days of the month. This time she bled 5 days before the month started and saw nothing in the first 5 days of the month. The time of her haidh has changed and is now earlier than what it used to be.

(Manhalul Waarideen)