Help me take my family on holiday

I'm nearly 32 and have never been abroad, my partner and I decided to book a holiday last September for September 2018. We saved hard for the deposit and paid about a 3rd of the holiday off. We are taking my mum also as we have lost my gran, my aunty and my uncle In the space of 2 years and wanted to treat her, so this holiday is quite important to myself and my family ( my 3 boys also) we had a budget set up to pay for the holiday by July, however my partner has lost his job. We desperately want to go on our holiday and don't want to cancel. Please help my family.