next monday
$ curl -X POST -d "apikey=xxx" -d "outputMode=json" -d "text=next Monday" --data-urlencode "anchorDate=2016-09-12 00:00:00" "https://gateway-a.watsonplatform.net/calls/text/TextExtractDates"
{
"status": "OK",
"usage": "By accessing AlchemyAPI or using information generated by AlchemyAPI, you are agreeing to be bound by the AlchemyAPI Terms of Use: http://www.alchemyapi.com/company/terms.html",
"totalTransactions": "1",
"language": "english",
"dates": [
{
"date": "20160919T000000",
"text": "next monday"
}
]
}