15 degrees longitude east of the Greenwich meridian equals approximately +1 hour with respect to coordinated universal time (UTC+1). Generally, those countries west of the Greenwich meridian establish their official time by substracting minutes to UTC, whereas those countries east of the Greenwich meridian set their official time by adding minutes from UTC.
#Utc clock city code#
Similarly, section 260 of title 15 of the United States Code of Law establishes the following time zones: UTC-2, two hours less than UTC) and are usually assigned a name.įor example, according to Mexico's national metrology center and the law governing the time system, in Mexico the following time zones have been established: These UTC deviations, either positive or negative, are called time zones, and they are expressed in terms of hours (i.e. In other words, the local time of a country is a deviation from UTC. To establish their official time, countries add or subtract minutes to UTC by taking into account political and economic reasons as well as their geographical position with respect to the Greenwich meridian. UTC is obtained from International Atomic Time, a time standard calculated from a weighted average of the signals of about 70 atomic clocks located in different parts of the world. Then you wouldn't need to look it up at all.Universal Time Coordinated, abbreviated as UTC, is the base time for all civilian clocks in the modern world. Even better, some geolocation APIs will already have the time zone identifier in their result.Īlternatively, you could gather the time zone from a list when you first create your data, saving the time zone identifier with the quote. Then you can use one of these methods to get the IANA time zone identifier.
With such APIs, you can look up a complete address (not just the city) to its approximate latitude and longitude. You'll also likely run into localization issues.Ī better approach would be to use a geolocation API, such as those available from Google, Microsoft and others. It won't resolve smaller cities and suburbs. (Try passing "Springfield" to city-timezones and you'll see.) Additionally, city-timezones only has major cities. Many cities names are reused in many places around the world. Both Luxon and date-fns have functions you could use instead, or there's Intl.RelativeTimeFormat.īe careful with resolving time zones from a city alone. Also, be aware of Moment's project status. Just use the UTC time as it is given in your input. You don't need to convert to other time zones for your timeUntil value. Instead, try Intl.toLocaleString with the timeZone option, or a modern library like Luxon. You're seeing the date reflected in your own time zone, because Angular's formatDate function does not work with IANA time zone identifiers. I have also tried: var d1 = new Date('T05:15:00.000Z') ĭ1.toLocaleString('en-US', ) //get leg date/time in the device timezone - America/New_York Let timeUntil = moment(dateHere).fromNow() use the device location time to display a time until expiration countdown result - dateHere = ' 02:45:00 GMT-04:00' (same date is coming back) convert the city/state time into the device location timeĬonst dateHere = formatDate(dateLocal, 'yyyy-MM-dd HH:mm:ss zzzz', 'en-US', Intl.DateTimeFormat().resolvedOptions().timeZone ) // Intl.DateTimeFormat().resolvedOptions().timeZone = America/New_York
convert the UTC time to the offsetted time that matches the city/stateĬonst dateLocal = formatDate('T05:15:00.000Z', 'yyyy-MM-dd HH:mm:ss zzzz', 'en-US', cityLookup.timezone ) //cityLookup.timezone = America/Los_Angeles Using //use cityTimeZones to get the timezone for the quoted city.Ĭonst cityLookup = cityTimeZones.lookupViaCity("Las Vegas") My problem is getting the two dates formatted/converted into the proper timezones. What I think I need to do is use the city/state combo to identify the timezone offset and save a separate date time variable in the account. There have been instances where communication was confusing because time zones were forgot about and quotes were either pre-maturely or post-maturely closed. The problem is this specific expiration is for a user in Las Vegas, NV. Admins are located around the USA and the quotes are entered as if they are the user (different timezones are possible so we format as UTC).
#Utc clock city update#
I am trying to update a quoting system to show time left until a quote expires.Īdmins enter a quote for a user and within all the data there is a date, time, city and state.
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