Fall back day意思

"Fall back day" is a term that is often used in the context of daylight saving time (DST). In many countries that observe DST, clocks "fall back" one hour on a specific date in the fall (autumn), typically marking the end of daylight saving time. This is the opposite of the springtime change when clocks "spring forward" one hour, effectively moving an hour of daylight from the morning to the evening.

When clocks "fall back," the time reverts back to standard time, which means there is an extra hour of daylight in the morning and an hour less of daylight in the evening. This change is typically made to align with the natural cycle of daylight and darkness, as the days become shorter in the fall and winter months.

The exact date of the "fall back" day can vary by country and sometimes by region within a country. In the United States, for example, clocks usually "fall back" on the first Sunday in November. In the European Union, it is the last Sunday in October. It's important to check the specific dates for the country or region in question, as they can change due to local legislation or international agreements.

It's worth noting that not all countries observe daylight saving time, and even among those that do, there can be variations in the start and end dates. Additionally, some places have abolished DST altogether, so it's always a good idea to check the current status for the relevant location.