How to upload high frequency data in to eviews from excel? Step 1: Open the excel file > combine the date and time column giving the following command =INT(A1)+MOD(B1,1) where A1 is the date and B1 is the time. Step 2: Upload the excel file into eviews by right click on the excel file and open with eviews. Eviews will automatically consider your file is undated/unstructured Step 3: Open the date series in eveiws Go to properties which is the fourth column from the left, properties box will appear. Change the date formate in to "Date-Time" Date formate in to "YYYY-MM-DD HH:MI" Click ok Step 4: Come to Command line of the Eviews and give the following Command pagestruct @date(date) Press enter Press Ok