How to chronologically remap three different arrays into one array?

Hi , I am developing a timeline feed system using parse cloud. I need to map three different results into one file based on the upload date. The following is the array structure.

var firstArrayFromPromise = [
    {"uploadedAt ": date, "data" : {object} },
    {"uploadedAt"  : date    , "data" :{object} }
]

var secondArrayFromPromise = [
        {"uploadedAt ": date, "data" : {object} },
        {"uploadedAt"  : date    , "data" :{object} }
    ]

What's the most efficient approach to achieve this? Any help will be highly appreciated.