I need to know what is the Marco Zero ( The Root brain ) of the Date, time, time zone, IP Address, and Location.
For example:
Date, Time, and Time zone ( In automatic mode ) come from the carrier and NTP servers I think.
IP Address come from the optical fiber internet broadband...
And location from GPS.
Well, I think this is correct, isn't it?
Which is the main root of all of these items?
I need to know because I'm using a Motorola Moto e6i with Android Go Edition.
Why on the earth this is stuffs doesn't have accuracy 100%?
The second question is:
Does exist some way to synchronize the Date, Time, and Time zone ( in automatic mode ) with an official APK of an official NTP/ Nist server of the world without Root Rights on the device?
I use the time.is to monitoring the time on this device...
Fun fact is: even the cellphone is configured with date, time, and time zone in automatic mode...
There is a little lost//variation//oscillation in synchro of Date, time, and time zone...
This is normal?
Also, happens in NTP Nist Official servers of world?
Related
I'm testing some API calls and was delighted to see that the seven-day forecast was including the current day. Around mid-day my time, the seven-day forecast changed and started returning tomorrow as the first day instead.
https://developer.here.com/documentation/weather/topics/example-seven-day-weather-forecast.html
My theory is that the servers are in California (or similar timezone). I'm in Stockholm. It was probably still "yesterday" in the server's timezone when I started playing with the APIs.
Any suggestions on how to fix this? Ideally, I'd like to see an additional parameter allowing me to specify my timezone, or (even better) automatic timezone detection of the requester.
The requester's timezone is not used in the retrieval of the weather data. The reference time(zone) is the local time of the location of which weather data is requested. For the seven days weather forecast, the next day is chosen as the start day if the local time is after 15:00.
Using forecast_hourly as product parameter will give you hourly weather data starting from the current local day and not the next day.
I have an icalendar I generate via PHP so people can download the latest schedule to their phones. It works great except that the game times are off by 6 hours on my iPhone. The game time is perfectly fine displaying on Windows calendar.
I've tried playing with the timezones and times but cannot get them to be equal on all platforms.
The calendar is viewable at:
webcal://cal.outbackthunder.com
Dawson,
your ics file at http://cal.outbackthunder.com has the event dates specified in 'local' or 'floating' times.
So the importing app will probably make the events be that time in it's timezone. 8am is 8am in all timezones (think of a travellers alarm clock - where they want to wake at 8m no matter the timezone they are in, vs a reminder to call their partner at 8am in the home timezone, where they'd then want it to adjust to the traveling timezone.)
Either add a Z and issue date-times in UTC, or add the TZID identifer of the timezone.
See https://www.rfc-editor.org/rfc/rfc5545#section-3.3.5.
See these examples in the spec:
Example: The following represents July 14, 1997, at 1:30 PM in New
York City in each of the three time formats, using the "DTSTART"
property.
DTSTART:19970714T133000 ; Local time
DTSTART:19970714T173000Z ; UTC time
DTSTART;TZID=America/New_York:19970714T133000
; Local time and time
; zone reference
Also try running your ics file through as many validators as you can find if you want the general public to be able to use the url. They tend to report slightly differently. EG: one says of http://cal.outbackthunder.com
DATE-TIME value in [DTSTAMP] must be specified in UTC time
Property [ORGANIZER] must be specified once
After allowing the user to select their timezone many applications ask if the DST adjustment should be made. Given resources like the tz database which contain past and present information on DST observances for each timezone, why do applications ask?
They shouldn't. Usually those that do are not using the tz database and have made invalid assumptions about how time zones work.
It is usually paired with a time zone selection dropdown that only lists numeric offsets, like this:
One should instead consider asking for time zone like this:
By asking for countries first, one can reduce the choice of time zones from the tz database to just a handful for the country. And since many countries only have a single time zone, sometimes the user will just need to select their country.
BTW - Both of the above graphics are from the Pluralsight course, Date and Time Fundamentals, of which I am the author. I cover this issue, and many other similar common mistakes.
You can also read more in the timezone tag wiki, in the section titled "TimeZone != Offset".
There is one common exception to this rule - Microsoft Windows. If the chosen time zone has DST, then Microsoft allows a user the option to disable it:
This is sometimes needed because there are places in the world that are not represented fully by the options Windows presents. Microsoft doesn't use the TZ database for this, but has their own time zones that they maintain.
For example, if you live in Atikokan, Ontario, Canda, the only valid selection in Windows is Eastern Time with DST disabled. Compare that with the TZ database, which has defined a zone specifically as "America/Atikokan".
This can create a problem for .NET developers, as TimeZoneInfo.Local.Id will return "Eastern Standard Time" regardless of whether the DST flag is turned on or off in the control panel. However, if it's disabled, then all of the adjustment rules will have been stripped away. In other words, TimeZoneInfo.Local != TimeZoneInfo.FindBySystemId(TimeZoneInfo.Local.Id). If the application just stores the ID, then it has no way to retrieve the time zone for somewhere like Atikokan.
I have the lat and long of a location and want to know whether it is day or night in that location or at least know the time there.
Is there a way to do this without using web services?
There is an explanation of how to calculate the time of sunrise and sunset at http://williams.best.vwh.net/sunrise_sunset_algorithm.htm
That produces a result in UTC. The phone knows the current time in UTC. So you can then work out whether the sun has set, and how long ago, at the location you want.
I've noticed that on some devices the NSTimeZone's name method for a particular timezone can return different values. When testing the Brisbane time zone, my device returns #"Australia/Brisbane" whereas another user's device returns "Etc/GMT-10". Both iPhone's are running 3.1.2.
The Date and Time Programming Guide for Cocoa states that:
timeZoneWithName: The name passed to this method may be in any of the
formats understood by the system, for
example EST, Etc/GMT-2,
America/Argentina/Buenos_Aires,
Europe/Monaco, or US/Pacific, as shown
in the following code fragment.
I'd just like to know what could determine which value is used? The device? The language?
I've discovered what the reason for this was.
When manually setting the timezone from Apple's build-in list, the correct and exact timezone name is returned. However, some mobile carriers provide the current time zone offset over the air, and if this is the case, Apple provide an "Automatic" setting which allows the iPhone to change time zone automatically when they move across into another time zone.
The problem is that while the current GMT offset is provided, there's no way to tell what latitude the user is at. Obviously, there may be for example, several cities in Australia with the a time zone of GMT -10. Therefore, no specific time zone name is available, only that the phone is currently GMT -10.
I've never scene what you describe. In my experience it returns the name you created it with.
In any case, if you're using the name for UI display, you should call [NSTimeZone localizedName:locale:] to force the name style you want.