1989 to 2023


Taylor Swift has been dropping hints – and marketing material – regarding her rerecorded album 1989.

Tiananmen Square in Beijing saw student protests and demonstrations erupt during the spring of 1989, leading to widespread student unrest and demonstrations.

F. W. de Klerk was elected State President of South Africa and began dismantling apartheid.

Year on Earth

1989 marked an inflection point in history, with revolutions against communist governments across Eastern Europe culminating in the fall of the Berlin Wall and Czechoslovakia’s Velvet Revolution a month later. China then violently suppressed protesters at Tiananmen Square while Carlos Menem was elected President in Argentina and Bond University opened for business on Australia’s Gold Coast.

In the US, a flag protection law went into effect, a train accident took place in Pennsylvania, and Stanley Pons and Martin Fleischmann announced their successful cold fusion experiment. Meanwhile, in March, the Soviet Union decided to abandon nuclear weapons and open its borders up for trade; April saw half a million people gather against communist rule at Alexanderplatz; Soviet troops then reoccupied East Prussian city Greiz, while Exxon Valdez oil spill in Alaska claimed hundreds of whale lives.

As of January 1, 2023, Earth is currently home to 11,330 objects orbiting it; these include both manmade and natural satellites as well as unmanned spacecraft/asteroid missions like Viking I, which has touched down on Mars.

2024 will be a promising year for those born under the Chinese zodiac year of the Snake, thanks to “The Sun’s” auspices bringing them new patrons and work opportunities, smooth career development, increased financial fortunes compared to past years, as well as some minor accidents from “Hui Qi.” However, those born in 2024 should pay extra attention to health management to prevent minor incidents occurring during this year.

The date of Earth Overshoot Day can change year by year due to incomparable data from previous years. Media reports comparing 2007 and 2018 Earth Overshoot Days could give false results as improved historical figures and new findings (such as decreased net carbon sequestration) have altered these numbers; for a more accurate comparison, one must use the same edition of Ecological Footprint or Biocapacity Accounts.

Year on Other Planets

A year is different for each planet in our solar system, starting with Mercury as it lies closest to the Sun with an annual cycle lasting only 88 Earth days; Venus follows closely behind with 225 days, while Earth boasts approximately 365.

As one ventures further out in our solar system, planets tend to experience longer years and seasons; on Jupiter, they last approximately three years, while Saturn experiences one that lasts about seven. Neptune has even longer seasons – its axial tilt measures 30 degrees while it boasts 164.8 Earth days of season time each year!

Mars experiences two years every 24 Earth days, featuring very short days and long nights. Its orbit is nearly circular, reaching perihelion (closest point to the Sun) each New Year’s Day and aphelion on July 4 each year.

Neptune will reach opposition (when it stands 180 degrees from the Sun on the sky’s dome) on September 19, and it will become a conspicuous object, though you will require optical aid in order to see it correctly.

Hubble has provided longstanding coverage of the outer planets’ ever-evolving atmospheres since 1989, complementing observations by the Juno spacecraft orbiting Jupiter, the Cassini spacecraft at Saturn, and Voyager 1 and 2 probes, which passed all four giant planets between 1979 and 1989.

Laura Chavez of the University of Colorado at Boulder has conducted groundbreaking research on Neptune using Voyager images taken between 1989 and 2001. Her analysis found that its atmosphere features bright clouds similar to the familiar cirrus clouds we encounter here on Earth; these reflective cirrus clouds reflect all colors of sunlight from Neptune’s methane atmosphere and suggest its seasonal weather cycle has returned following two Neptunian years without evidence. This could signal that Neptune has begun its seasonal weather cycle again!

Leap Year

A leap year is a particular type of calendar year that adds one extra day to February every four years to keep our calendars aligned with Earth’s orbit around the Sun. Leap years have been in use since Julius Caesar, but there is actually science behind them! UCF physics professor Josh Colwell offers more insight into this extra day’s composition as part of an in-depth explanation about leap years.

Julius Caesar laid down the first rule for leap years during Roman rule; any year evenly divisible by four would qualify as a leap year. Although this rule remains in use today, over time, it has been modified a bit; today, any century year such as 1900 or 2100 that also happens to be evenly divisible by 400 will not count as a leap year; this ensures it does not fall out of sync too rapidly with astronomical year cycles.

Leap years were initially implemented to ensure our calendars matched up with those in the real world, enabling accurate season tracking. This process, known as intercalation, involves adding days or months onto our calendars so they match up to reality.

Calendars must also take into account that Earth takes longer to rotate on its axis than to orbit around the Sun, leading it to eventually move away from following our years as intended. To account for this phenomenon, leap years or intercalated dates need to be added occasionally into calendars in order to compensate.

Understanding what constitutes a leap year is crucial since its effects can have far-reaching ramifications on how we measure time. For instance, being born during such a year causes your age to be one year lower than expected by using standard counting techniques.

Year Calculator

Many people are familiar with the formula for calculating how old someone is by adding up the years since birth, but to accurately determine the time between two dates, you need more complex calculations involving leap years and how many days there are per year. Luckily, this calculation doesn’t have to be complicated: use an online Year Calculator tool such as CalendarDateLock’s Year Calculator tool, and it will take care of everything for you – your results will always be precise regardless of which way of defining time you choose!

Our Year Calculator makes it easy to enter two dates and calculates how many years passed between them. It also displays months and can show days or weeks as desired.

For easy use of this tool, enter two dates you wish to compare in their respective fields and press the “Calculate” button. A decimal will show how many years separate them, but you can change this in the upper left corner by changing units (months/days/weeks).

This tool can also help you calculate the age difference between two people. To do so, it requires knowing their birth year as well as the current year to calculate the difference. Once this has been accomplished, use this formula: age = years + months + days to figure it further – when finished, add them up to find their actual age!

This tool also takes into account leap years, providing more accurate answers than a simple year-on-year comparison. Additionally, you can calculate decade gaps between two dates with or without leap years’ extra day tacked onto them – just be sure to select each box correctly and don’t include negative numbers or symbols!