[Codger]

Thank you Fizzlemizz. Those are both very good points and I appreciate your thoughtful replies.
This code has been modified to use a unique database name and a more generic form of the date function.
I might have overdone the db name a little bit, but it makes a good point.

Here is the saved variables toc file:

## Title: MyAddon
## Interface: 100206
## Version: 1.0
## Author: 
## Notes: A simple WoW addon using a database
## SavedVariablesPerCharacter: MyAddonDBExampleMarch2024 --must be unique
MyAddon.lua

Here is the saved variables lua file:

-- Create a saved variable to store last time
local lastLogoffTime = nil
 
-- Create a new frame
local frame = CreateFrame("Frame")
 
-- Load last logoff time from saved variable
local function LoadLastLogoffTime()
    if MyAddonDBExampleMarch2024 then
        lastLogoffTime = MyAddonDBExampleMarch2024.lastLogoffTime
        print("Last logoff time loaded:", lastLogoffTime)
    else
        print("Trying to load logoff time but MyAddonDBExampleMarch2024 is nil.")
    end
end
 
-- Save last time to saved variable
local function SaveLastLogoffTime()
    if not MyAddonDBExampleMarch2024 then 
        print("Trying to save logoff time but MyAddonDBExampleMarch2024 is nil") 
    else
        MyAddonDBExampleMarch2024.lastLogoffTime = date()
    end
end
 
-- Hook the Logout event to update last logoff time
frame:RegisterEvent("PLAYER_LOGIN")
frame:RegisterEvent("PLAYER_LOGOUT")
frame:SetScript("OnEvent", function(self, event)
    if event == "PLAYER_LOGIN" then
        if not MyAddonDBExampleMarch2024 then
            MyAddonDBExampleMarch2024 = {}
            print ("MyAddonDBExampleMarch2024 was nil")
        end
        LoadLastLogoffTime()
    elseif event == "PLAYER_LOGOUT" then
        SaveLastLogoffTime()
    end
end)
 
-- Slash command handler function
local function SlashCommandHandler(msg)
    LoadLastLogoffTime()
end
 
-- Register slash command
SLASH_MYADDON1 = "/myaddon"
SlashCmdList["MYADDON"] = SlashCommandHandler

One more question, if I had an extremely unique database name that was 50 or 60 characters long, how could I set up an alias?
Something like a local variable defined at the top and set in event PLAYER_LOGIN?