Power Query; Convert Time Stamp to Date Time



Power Query has number of Date and Time functions that convert values to date and time. However I haven’t found a function that converts a timestamp value. Fortunately it is easy to calculate a date time from a timestamp value. In this post I’ll explain an easy way of converting timestamp to date time. To Learn more about Power Query read Power BI online book; from Rookie to Rock Star.

What is Timestamp

Timestamp is a whole number value, which is number of seconds from date 1970-01-01 00:00:00. For example; timestamp 100 means 1970-01-01 00:01:40, or timestamp 86400 means 1970-01-02 00:00:00. So the calculation is easy; We have to add timestamp as seconds to the date/time 1970-01-01 00:00:00.

Power Query Convert Timestamp to Date Time

Once we know what is definition of timestamp, and how to calculate date/time from it; easily we can use #duration(0,0,0,<timestamp value>) to show duration in seconds, and add it to the #datetime(1970,1,1,0,0,0) which is date time 1970-01-01 00:00:00.

So as a result, here is the code to convert timestamp to date time;

above query will respond  11/11/2014 9:12:45 AM.

Please note that you have to replace the 1415697165 number with the field name containing timestamp values, or with your static timestamp value in the query.



Reza Rad
Reza Rad is an Author, Trainer, Speaker and DW/BI Consultant. He has a BSc in Computer engineering; he has more than 15 years’ experience in databases, programming and development mostly on Microsoft technologies. He is a Microsoft MVP in Data Platform for seven continues years (from 2011 till now) for his dedication in Microsoft BI. He is author of some SQL Server and BI books, and also Power BI online book; from Rookie to Rock Star.

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