Final answer:
The calendar changes such as the shift to the Gregorian calendar affected how birthdays are celebrated, as seen with George Washington's birthday changing from February 11th to February 22nd.
Step-by-step explanation:
Understanding how calendar changes have impacted the way we recognize birthdays is a fascinating topic. For example, the introduction of the Gregorian calendar led to a one-time correction to align dates properly. This not only affected everyday life but also the annual celebration of birthdays. For instance, George Washington's birthday, originally the 11th of February, shifted to the 22nd of February when the British Empire adopted the Gregorian calendar in 1752. Moreover, a fictional story titled “Tibaldo and the Hole in the Calendar” by Abner Shimony describes the peculiar scenario of a boy whose birthday vanished due to the calendar correction. Similarly, individuals might not always remember their birthdays amid their daily routines, as illustrated by the diary entry from July 5, 1918, where the diary's author forgot his birthday until he needed to date a report.