You could very well be right, according to this[0] post on Twitter:
> Hey @RobinhoodApp
did someone forget to add isleap() to your python module? Imagine losing thousands of dollars because someone didn’t code for the leap year. It’s looking for 3/03 data and throwing errors out the ass. https://pbs.twimg.com/media/ESIuB4nXYAAYImF?format=jpg