In ArcMap 10.4 you can use a python function to update the date type value of one column from another column using field calculator. Below a code snippet on how to achieve this provided that the date value is not just time.
Step 1 – Select the layer that you want to make update to. Right click on the layer and select open attribute table from the pop up menu.
Step 2 – Highlight the rows of data you want to make changes to and then right click on the header of the column. Select Field Calculator from the pop up menu.
Step 3 – In the Field Calculator dialogue box select “Show Codeblock”. Add the python function in the section where it says ‘Pre-Logic Script Code’:
from datetime import datetime
def validate(date_text):
try:
if date_text != datetime.strptime(date_text, "%m/%d/%Y").strftime('%H:%M:%S'):
return date_text
except ValueError:
return None
In the section below add a call to the function:
validate(!Date!)
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