How long should one breastfeed ?

Breastfeeding advocates would recommend to let a child nurse as long as he/she wants and avoid force weaning. Per WHO, breastfeeding should be for at least two years (6 months EBF), which is why Philippine milk ads would always say "breastfeeding is best for babies up to 2 years of age and beyond." Personally, I was weaned at 7 years old because my mom's milk was continuous as she is also nursing my younger siblings. It's up to you until when you should breastfeed as long as you and your child mutually want to, considering all other factors. :)