Determination of the day of the week possible to do all the calculations in one's head with a little practice). None of the methods given here perform range checks, so unreasonable dates will produce erroneous results. Every seventh day in a month has the same name as the previous: "Corresponding months" are those months within the calendar year that start on the same day of the week. For example, September and December correspond, because September 1 falls on the same day as December 1. Months can only correspond if the number of days between their first days is divisible by 7, or in other words, if their
Labor Thanksgiving Day is still held privately by the Imperial House of Japan on the same day as Labor Thanksgiving Day, which has become a public national holiday. May 1 is also celebrated as Labor Day by many trade unions in Japan, which hold large rallies and marches in Tokyo, Osaka and Nagoya. Labor Thanksgiving Day Events are held throughout Japan, one such being the Nagano Labor Festival. The event encourages thinking about the environment, peace and human rights. Early-grade elementary students often create drawings for the holiday and give them as gifts to local kōbans (neighborhood police stations). Labor Thanksgiving Day is