Cumulus Support

When does Cumulus compute this tag? I would assume at midnight the setting would change, and would stay the same until midnight the next day, but I feel like the value is changing sometime during the day.

-Tom

All webtags and details are listed in the Wiki -

<#tomorrowdaylength> A string giving the difference between the length of day light today and tomorrow. Note. This tag has been shown to generate inaccurate results and will probably be removed from Cumulus but is here for reference only.

Paul

Thanks for the reminder but it didn't answer my question.

At start up and then every hour, on the hour.

steve wrote:At start up and then every hour, on the hour.

I'm curious, why would it need to be updated hourly? Isn't it just a simple computation based on the following day's sunrise/sunset times?

-Tom

krmidas wrote:I'm curious, why would it need to be updated hourly? Isn't it just a simple computation based on the following day's sunrise/sunset times?

It doesn't need to. All of the astronomical data is recalculated hourly to allow for things like switching to and from daylight savings time, and to keep the moon phase data current. I suspect that for part of the day, for some time zones, the astronomical data is not quite correct (it gets tomorrow's time(s) instead of today's, perhaps) which would explain why the difference figure changes.