//Code is written on 02/01/2018 by Ice Demon //Format doesn't matter, you could type 01, or 1, 02017 or 2017 the only thing that matter is the correct date //Suggest more fun facts in the comments, please :) //Report bugs if there are any (I've tested with a lot of dates, and for now, there are no bugs) var d = new Date(); var currentDay = d.getDate(); var currentMonth = d.getMonth() + 1; var currentYear = d.getFullYear(); //Get the current date(s) var yourDay = parseInt(prompt("Enter the day you were born: ")); var yourMonth = parseInt(prompt("Enter the month: ")); var yourYear = parseInt(prompt("Enter the year: ")); //User input function showDate() { document.write("Your birth date is: "+yourDay+"/"+yourMonth+"/"+yourYear+""); }//Show input on the screen //Functions function checkMistakes(){ //If there are mistakes, the code won't go to the end var isItCorrect=true; if (yourDay>=32){ alert("There are no more than 31 days in a month!"); isItCorrect=false; //Checks if the input for days is larger than 31 } else if (yourMonth>=13){ alert("There are no more than twelve months in a year!"); isItCorrect=false; //Checks if the "yourMonth" is larger than 12 } else if (yourDay>=29 && yourMonth==2 && yourYear%4 !=0){ alert("There are no more than 28 days in February (except if that year is a leap one)"); isItCorrect=false; //Checks if the date is 29th february } else if (yourDay<=0 || yourMonth <=0 || yourYear <=0) { alert("That's not possible!"); isItCorrect=false; //Checks if the input is below (or) zero } else if (yourDay==null || yourMonth==null || yourYear==null){ alert("Type something, please."); isItCorrect=false; //Check if the input is empty } else if (isNaN(yourDay) || isNaN(yourMonth) || isNaN(yourYear)) { alert("Wrong input, probably."); isItCorrect=false; //Check if its not supported input (anything besides numbers) } else if ((yourDay>currentDay && yourMonth>=currentMonth && yourYear>=currentYear) || yourYear>currentYear){ alert("That is the future!") ; isItCorrect=false; //Checks if the date is in the future } else if (yourDay==currentDay && yourMonth==currentMonth && yourYear==currentYear){ alert("Please, enter a date that isn't today."); isItCorrect=false; //Checks if the date is the today's one } if (isItCorrect==false) { wrongInput(); //If the input is wrong, the "wrongInput()" function will be executed } else { calculateDate(); //If the input is correct, the "calculateDate()" function will be executed (Which is the correct one) } } function wrongInput(){ //ONLY EXECUTES IF THE INPUT IS WRONG document.write("Your date wasn't correct, please refresh the page and try again :)
"); return; } function calculateDate(){ //IF THE INPUT IS CORRECT showDate(); //Calling the "showDate()" function var nowDay = currentDay-yourDay; if (currentDay currentMonth) { nowMonth++; } //The code below checks if the year is leap or not var counter=0; while (yourYear<=currentYear){ var x = (yourYear % 4) == 0; var y = (yourYear % 100) != 0; var z = ((yourYear % 100 == 0) && (yourYear % 400 == 0)); if (x && (y || z)){ counter++; } yourYear++; } document.write("

You are ~"+nowYear+" year(s), "+nowMonth+" month(s) and "+nowDay+" day(s) old!
"); //Fun facts: var seconds = (86400*nowDay) + (86400*Math.round(nowMonth*30.5)) + (86400*365*nowYear) + (counter*86400); //seconds var minutes = (seconds / 60); //one minute has 60 seconds var hours = (minutes / 60); //one hour has 60 minutes var days = (hours / 24); //one day has 24 hours var months = (days / 30.5); //the average is 30.5 var football = (minutes / 90); //soccer/football match lasts for 90 minutes var portal1 = (minutes / 220); //average time for portal 1 is 220 minutes var portal2 = (minutes / 520); //average time for portal 2 is 520 minutes var halflife = (minutes / 1500); //average time for half life franchise is about ~25 hours var movies = (minutes / 120); //let's say that the duration for an average movie is about 120 minutes var this_code = (minutes / 100) //100 minutes were needed for this code //outputs document.write("
These are some fun facts about the amount of time you are alive: "); document.write("
You are alive for ~"+seconds+" seconds!"); document.write("
You are alive for ~"+minutes+" minutes!"); document.write("
You are ~"+hours+" hours alive!"); document.write("
You are ~"+days+" days alive!"); document.write("
You are ~"+Math.round(months)+" months alive!"); document.write("
You could've watched ~"+football+" football matches!"); document.write("
You could've beaten Portal 1 ~"+Math.round(portal1)+" times!"); document.write("
You could've beaten Portal 2 ~"+Math.round(portal2)+" times!"); document.write("
You could've beaten the whole Half-Life franchise ~"+Math.round(halflife)+" times!"); document.write("
You could've watched ~"+movies+" movies!"); document.write("
You could've written this code ~"+Math.round(this_code)+" times!"); } //Calling the function(s) checkMistakes(); //The end of the program

How long are you approximately alive + some facts