LEAP SECOND TIME ADJUSTMENT DAY

"Leap Second Time Adjustment Day is listed as an observance title only."https://www.nationaldaycalendar.com/national-day/leap-second-time-adjustment-day-december-31

New Year

"For millions of people, the year 2026 will begin once a crystal-covered ball, 12.5 feet in diameter, makes its descent in New York City's Times Square."https://www.cbsnews.com/news/the-history-of-the-new-years-eve-ball-drop/?utm_source=join1440&utm_medium=email&utm_placement=newsletter&user_id=66c4c92f5d78644b3ac5d5b4

Time Dilation

"Time dilation refers to the seemingly odd fact that time passes at different rates for different observers, depending on their relative motion or positions in a gravitational field."https://www.livescience.com/what-is-time-dilation?utm_source=join1440&utm_medium=email&utm_placement=newsletter&user_id=66c4c92f5d78644b3ac5d5b4

Backwards Time

"Imagine time running backwards. People would grow younger instead of older and, after a long life of gradual rejuvenation – unlearning everything they know – they would end as a twinkle in their parents’ eyes."https://theconversation.com/what-is-time-and-why-does-it-move-forward-55065?utm_source=join1440&utm_medium=email&utm_placement=newsletter&user_id=66c4c92f5d78644b3ac5d5b4

TICK TOCK DAY

"Tick Tock Day, observed annually on December 29th, reminds us to complete any unfinished business that might need addressing before the end of the year."https://www.nationaldaycalendar.com/national-day/tick-tock-day-december-29

Waves in Time

"Physicists have experimentally reversed electromagnetic waves in time, confirming a theoretical prediction that has stood for decades."https://dailygalaxy.com/2025/12/physicists-prove-time-mirrors-real-with-electromagnetic-flip/#google_vignette

Nature of Time

"The nature of time is one of the most profound and longstanding problems in physics – one that no one can agree on."https://www.sciencefocus.com/science/the-closer-we-look-at-time-the-stranger-it-gets

PRETEND TO BE A TIME TRAVELER DAY

"Pretend to Be a Time Traveler Day on December 8th encourages us to step from our Tardis or flip open our Omni while wearing clothes from the past."https://www.nationaldaycalendar.com/national-day/pretend-to-be-a-time-traveler-day-december-8?utm_source=Iterable&utm_medium=email&utm_campaign=15979300&hashed_email=6c23328441e0f46865e8039a24ce7ccf8880f2d7&email=yeremiah%40aol.com

Theory of Relativity

"Physicists have verified a key prediction of Albert Einstein’s special theory of relativity with unprecedented accuracy."

https://www.scientificamerican.com/article/einsteins-time-dilation-prediction-verified/