Rugged Beater With Perpetual Calendar Suggestions?

[mountainjogger]

I usually know what time it is (or pretty close), the month and the numeric day of the month, without looking at my watch or phone. What has always been harder for me to remember when I get wrapped up in something is what day of the week it is.

So, I have been thinking about a true beater I can wear while doing tasks on the farm with a day of the week function. However, I don't want to mess with resetting the day of the month. So, I am guessing I need a perpetual.

I am open to battery or solar power if necessary.

Thoughts?

Off to do some chores, will check back latter.

Thanks.