I'm looking for how to declare a time for a configurable number of minutes before 1 pm east coast time on the day of running the program. I've found ways to get a fixed time of the timezone such as:

chrono::zoned_time onePmEastCoastTime ("New York/New York", chrono::sys_days{ 2022y / chrono::April/ 15d } 13h );

How can I declare a configurable time that will match a specific timezone?

CodePudding user response：

It sounds like you want to specify the time in terms of local time as opposed to UTC. The key to this is in the use of local_days vs sys_days.

sys_days is a count of days in UTC.

local_days is a count of days in some local time that can be subsequently paired with a timezone.

Maybe you are looking for:

chrono::minutes m = ...
chrono::zoned_time onePmEastCoastTime{"America/New_York",
      chrono::local_days{ 2022y / chrono::April/ 15d }   13h - m};