Autohotkey script for inserting the Excel compliant current date and time any time you type Dnow http://www.autohotkey.com/

insert_date.py

import datetime

format_str = '%Y-%m-%d %H:%M:%S'

now = datetime.datetime.now()
output = now.strftime(format_str)

keyboard.send_keys(output)

## Installation
## sudo apt-get install autokey-gtk
##
## Configuration
## Copy/paste this in to a new script
## Script settings:
## [ ] Always prompt before executing this script
## [ ] Show in notification icon menu
## Abbreviations: Dnow
## Hotkey: (None configured)
## Window Filter: (None configured)