It's an option (you don't have to follow it) but we night weaned at 13 months. We followed Dr Jay Gordon's method see here This was the start of growing a relationship for DP and DD.
Not that they didn't have a good one but I think if you breastfeeding past a certain age in to toddler hood then they are more attached to mum than dad.
The night weaning was one of several things we did.
Once we did night weaned, dd continued to nurse as and when during the day.
I continued to do bedtime but changed small things, for example, her bedtime breastmilk i started giving to her downstairs on the sofa, then DP would take her to bed.
It was gradual simple changes to her bedtime pattern involving DP every step of the way. I'd always go in to her if she genuinely sounded distressed with me not being there. Eventually she started to trust DP to see to her needs, ie offering water, a cuddle, reading a million stories etc.
In fairness it was a couple of nights out id gone to a sports class and DP had to cope and he did and so did she. She got used to it and now it's an ongoing thing that I or DP says to her to explain where I am "mummy going/gone gym"
and at 21 months old, she understands that dad will look after her.
We're still feeding btw. Night weaning didn't reduce the day time feeds but it had a positive affect on her eating more solids and have set (ish) times for breastfeeds.
Sorry for waffling hope this helps 