In fact, your example is perfect. We're not talking about business. CAs are different.
In security and infrastructure, there's always someone working on holidays. The larger the organization, higher are the chances that some kind of rotation exists.
My comment is not about how all work should stop during US holidays.
What I’m attempting to refer to, is that _if_ this was done with malicious intent, then maybe the hope was that doing it during a holiday would reduce response time or allow it to fly under the radar. Of course, as you say, just because it was a holiday does not inherently mean it’s malicious, it has plausible deniability.
What I actually said is that I believe that the notion of a holiday "hiding" these activities is naive. I don't think it makes any difference.
I don't know if there's a rotation or another system. I think there are probably multiple across different parties responsible for maintaining CA trust.
For as big a country as Brazil? Totally. I've worked at companies that had minor code freezes for all sorts of holidays in countries we had a big client presence in, specifically to avoid releasing changes to client that wouldn't have engineers in-office to adapt to them.
I did, multiple times with multiple countries. All of them had some sort of call rotation. Someone was always at the helm, _specially_ in infrastructure and security.
There are whole startups designed to solve this, like PagerDuty.
I am now very curious to understand where your question comes from. There must be some misunderstanding here. You never went on-call or seen a friend do it?
OP said it’s malicious or incompetent to release this on a U.S. holiday weekend. You asked if similar consideration would be given to Brazil. Multiple people chimed in that it would. You’re now pivoting to on-call capacity.
Any amount of on-call capacity can be saturated. That’s why competent multinationals avoid releasing while markets they’re likely to impact are sleeping or drunk. This is a high-level scheduling operation, however, so it’s reasonable for those lower in the organisation to be unaware why an update is being pushed next Tuesday instead of this.
Rotation or always-on isn’t a substitute for being aware of your customers. Good culture permeate this throughout the organisation. Competent ones have someone at the top ensuring controls are followed.
Would it be fair during that time if I asked you to hold your PRs, bug tickets and work in general because we're on paid leave?
On-call rotation exists for those reasons. Otherwise, all countries would need to respect all other countries holidays.
In fact, we're not even aware of most US holidays. It is likely to be a coincidence.