Most public company equity sales are subject to blackout periods where you cannot sell (usually prior to release of financials) because it is presumed anyone with equity compensation views material non-public information as a matter of course. Selling in those dates is subject to liabilities for the employees.
That said if your equity management system doesn’t handle this for you, you have other problems.
My company has blackout periods for certain parts of the company, such as finance. But not the whole company. And it does light grants for most all employees. But it gets pretty fuzzy fast as to who has MNPI vs who doesn't. Did someone mention a contract not getting renewed? Well now you might have MNPI and not be allowed to trade. Best to keep out of the blackout windows, and be extremely careful.
That said if your equity management system doesn’t handle this for you, you have other problems.