Unfortunately, corporate influence also had an effect good old’ Saint Nick (or Santa) wore green his whole life until Coca-Cola bought the rights to him. Global influence has had an impact on the holiday, for example in early modern Germany Protestants brought decorated trees into their homes on Christmas day. As a pre-existing time of celebration, it made sense for the Christians to celebrate the Birth of their saviour at this time! But all things change, and Christmas was definitely one of those things. It was the time of year the cattle were slaughtered, and the beer and wine had been fully fermented. If that was so, then why do Christians celebrate in the winter? Well, the time of Christmas was always a time for celebration, there was the Norse holiday of Yule, the Roman holiday Saturnalia, and of course the winter solstice. Some theorise that Jesus was in fact born in the summertime. Some airlines, like Southwest, offer seasonal flight sales, which means prices drop across their routes if you book within a particular time window. So, no matter how many times you search for the same flight with us, we’ll always show you the best prices available at that time. It will get a bit more complicated for 8-bit MCUs, admitted.What made this day so special? Yes, the birth of the Christian lord and saviour! You would think so, but the Bible never states the day Jesus was born. Skyscanner doesn’t use cookies to limit the prices we show you. If that is the case skip the addition of 1900 to tm->tm_year and change the check for 1708. Please add them, especially if the int data type has less than 32 bits (although most MCUs are 32 bit now, you might have had no need for it and changing the architecture just for a single date calculation?). Christmas and New Year holidays, Schools closed, Monday 25 December 2023. The code above has not very many bounds checks. Term dates, school holidays, and teacher in-service days for the 2023 to 2024. Printf("Next X-mas in %d days\n", days_until_next_xmas()) days_until_next_xmas() returns INT_MAX in case of error If (diff tm_year + 1900, today->tm_mon + 1, today->tm_mday, Too late, you have to wait until next year, sorry compute difference in days to the 25th of Decemberĭaydiff(today->tm_year + 1900, today->tm_mon + 1, today->tm_mday, get seconds since epoch and store it in no checks for the other bounds here, feel free to add them Printf("%g days untils christmas.\n", days) Christmas Day, on December 25, is one of the most festive Christian holidays in many countries around the world. So the code ends up the following: #include For converting a structured calendar time into time_t, you need mktime(). For current time in time_t format, you may use the time() function. Since difftime receives times in time_t format, we need both current time and christmas in time_t. The main task is to call difftime, where the target time is christmas and the start time is the current time. Seconds = difftime(mktime(xmas),currentDate) įirst of all, you should read the chapter about date and time on libc manual:ĭate and time handling in C kinda sucks, so you need to understand the concepts well so that you don't get confused. If (today.tm_mday > 25 & today.tm_mon = 11) Xmas->tm_mon = 11 // 0 = January, 11 = December Note you can run/modify the following code in your browser for free in this coding sandbox. Then you can use mktime() on it to convert it to type time_t for use in difftime(). The 'xmas' variable you have should be initialized in a slightly different way from how you initialized it. It is preceded by Advent (Nativity Fast Eastern Church with abstinence and penance) roughly 4 weeks prior to Christmas Day. Christmas is a Christian celebration celebrating the birth of Jesus Christ and is observed on December 25th each year. Therefore, the 'now' variable you used is not needed. Christmas Day for the year 2023 is celebrated/ observed on Monday, December 25th. You are on the right track, but difftime takes variables of type time_t as arguments.
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