The CFAA allows for this.
Yahoo EULA under section 2:
You also understand and agree that the Service may include advertisements and that these advertisements are necessary for Yahoo to provide the Service.
Yahoo EULA under section 16:
You agree that Yahoo shall not be responsible or liable for any loss or damage of any sort incurred as the result of any such dealings or as the result of the presence of such advertisers on the Service.
Ruling in favor of EULAs: Vernor v. Autodesk
I'm really tired of stupid date math. Bad enough it's already five different bases across six different numbers, with three of those bases dynamic based on four of the others.
Love that quote.
This is why I've always advocated for two times. One based on what you want (constant intervals of time), and one based on the position of the sun as a percentage or similar. We can go to town with the complexity of the latter, but the former should be kept as simple as possible like you say.
You mean like when they created time zones just for the rail industry?
One picture is worth 128K words.