Obviously this wish cannot be answered by adding more hours to a day. The solution can be found by using the time you have more efficiently.
Many parents work long hours and find that free time with their families is extremely limited.
Try to involve your children in what you need to do. Break down your big projects and delegate so that you can spend time together, even when simply doing chores. When planning a birthday or holiday party, make a list of the things to be done, and do one small part of the preparations every evening. For example, work on invitations one night, planning decorations the next, then decide on the menu, and so on. Your kids will enjoy being involved in the preparations and will feel proud they contributed to the success of the event.