sleeping through

Jackie • Mother of boys 💙 Instagram - @boy_mum_ • follow for meal and snack ideas 💡 ☺️
At what age did your babies start sleeping through the night? 
I have a 5 week and an 18 month old who sleeps 7pm - 7am. so obviously it's impossible for me to nap during the day. The night feeds are killing me, I know I have a long way to go. Just wondering what's the best way to get my baby to sleep through?