![Astrometry versus photometry astronomy](https://loka.nahovitsyn.com/58.jpg)
![24 hour utc clock 24 hour utc clock](http://clipart-library.com/images/8cAbjrqMi.gif)
However, many time zone boundaries are distorted by geographical and political factors. In theory, the UTC offsets countries use should reflect the local mean solar time. Two time components are added together to translate mean solar time to Coordinated Universal Time (UTC): International Atomic Time (TAI) measured by atomic clocks and Universal Time (UT1), the actual length of a day on Earth.
![24 hour utc clock 24 hour utc clock](https://militarytimechart.net/wp-content/uploads/2016/12/globes-1246245_1280.jpg)
There are two main ways to show the time: 24 Hour Clock or AM/PM. Letter 'Z' in military time indicates ZULU Time Zone which is equivalent to UTC. Z Time (UTC) Alaska Daylight Saving Time: Pacific Daylight Saving Time: Mountain. latin post meridiem, meaning after midday.
![24 hour utc clock 24 hour utc clock](https://www.locuradigital.com/var/cache/images/600-378/images_upload/mgj108b_1.jpg)
latin ante meridiem, meaning before midday, PM or P.M. Other names: Universal Time Coordinated / Universal Coordinated Time. For every 15 degrees of longitude east or west, mean solar time changes by 1 hour. Time difference between your local time and UTC is: -7 hour (s) ( -420 minutes). UTC / GMT is the basis for local times worldwide. Primarily, UTC is based on mean solar time at the prime meridian running through Greenwich, UK. Remember that, for some time zones, a day is not always made of 24 hours. The offset is expressed as either UTC- or UTC+ and the number of hours and minutes. Always use UTC when working with timestamps. All time zones are defined by their offset from UTC. In UTC, this will be a usual working time of between 5:00 pm and 6:00 pm. If you are in PST, the most convenient time to accommodate all parties is between 9:00 am and 10:00 am for a conference call or meeting.
![24 hour utc clock 24 hour utc clock](https://i.pinimg.com/736x/04/2c/83/042c832a2e4408a9694b1846c98b6951.jpg)
UTC-Coordinated Universal Time-is the 24-hour time standard used as a basis for civil time today. When planning a call between PST and UTC, you need to consider time difference between these time zones. The graph above shows that there is no clock change in UTC during 2022.
![Astrometry versus photometry astronomy](https://loka.nahovitsyn.com/58.jpg)