Good way to measure day 1 to day 25 ( duck eggs )

[cayuga mommy]

I always get the dates wrong for my eggs. I dont know what it is about me. But, for some odd reason I will be like. Ok, I put the eggs in the incubator on this day. Then I take them outta the egg turner on this day. Then they hatch on this day. And then a few weeks later I will be like "Wait, no, I put them into the incubator on this day. Then I will take them outta the egg turner on this day. And then they will hatch on THIS day." its so confusing for me! What are some tricks that help you?
Thanks.

 

[arllcountrygirl]

I do staggered hatching, so I use a calendar and write on top of the eggs the breed or date that they are set - I use a pencil to write on the shell.
On the calendar I write the date and breed and when they are put in, they day to candle, the day to stop turning and the day of hatch. So far this method has worked great.