Tippies can be quickly adopted with immediate workflow benefits...
Date and Time and Interval Shortcuts
Users often encounter fields where a date, time or interval needs to be specified. Examples include start and end dates for orders, visits and other scheduled events. A few shortcuts make it easy to place common values with minimum effort.
N for Now
N is the time right now
T for Today
T-1 is yesterday
W for Week
W-2 is 14 days ago
M for Month
M-1 is this day last month
MB for Month Begin
MB-1 is the first day of last month
ME for Month End
ME-1 is the last day of last month
Y for Year
Y-40 is this day forty years ago
For a reminder about these, use the F1 key, then look to the top drop-down menu in the popup that appears and select "F1 Help" view.