It was right around 2.5 months that my son started shifting his 2 hour feeds to a little longer. I did this by reading BW. I just had other ppl hold him and tried to extend his naps a bit. But he was ready for the shift and I was much better at reading his cues after reading BW. But I believe your lo will let you know when they are ready. A little encouragement from mama can't hurt either.
The good news is, when they start extended day time feeds, generally the night feeds start to extend even more!