1 00:00:00,660 --> 00:00:07,570 All right guys so dates and times are very important in programming and Javascript has what's called 2 00:00:07,570 --> 00:00:10,820 the Date object that we can use to do certain things with date. 3 00:00:10,820 --> 00:00:20,010 So let's go ahead and let's create a variable here let's just create our Val variable like we've been 4 00:00:20,010 --> 00:00:20,620 doing. 5 00:00:20,940 --> 00:00:24,560 And I'm going to set Val next. 6 00:00:25,140 --> 00:00:34,260 You know what I'm going to do is I'm going to set a constant called today and we're going to set it 7 00:00:34,260 --> 00:00:36,010 to a new date. 8 00:00:36,030 --> 00:00:40,360 OK so this is this is basically instantiating the Date object. 9 00:00:40,380 --> 00:00:44,850 And if we don't pass anything in here by default it's going to be today's date. 10 00:00:44,850 --> 00:00:55,920 So if we go down and we say that all equals today and then we cancel the log thou and save. 11 00:00:55,920 --> 00:00:58,800 You'll see down here we get today's date. 12 00:00:58,970 --> 00:00:59,310 All right. 13 00:00:59,310 --> 00:01:01,220 And if we were to look at the type. 14 00:01:01,520 --> 00:01:09,240 So if we see a type of this type of well we're going to get objects because a date is actually a reference 15 00:01:09,240 --> 00:01:13,900 type which is an object we could change it to a string if we want. 16 00:01:13,920 --> 00:01:25,070 So if we said Konst not actually we couldn't do it like that we'd have to do Val equals today Daut to 17 00:01:25,080 --> 00:01:27,420 string and then it would be a string. 18 00:01:27,420 --> 00:01:33,800 All right so we could do that if we wanted to if you wanted to do some stuff with strings with the date. 19 00:01:33,870 --> 00:01:40,140 Anyways I'm going to go back to just logging the bell and what I want to do now is show you how we can 20 00:01:40,140 --> 00:01:42,130 change it to a different date. 21 00:01:42,540 --> 00:01:53,610 So I'll create another variable here called birth day and I'll said it's a new date and then and here 22 00:01:53,940 --> 00:01:56,770 we can specify this in many different ways. 23 00:01:56,760 --> 00:02:05,400 So one way would be to do the nine dash 10 dash 1981 and then if we were to change the vowel which is 24 00:02:05,400 --> 00:02:13,440 what we're logging to birthday and save you'll see it's in the same format except it's now September 25 00:02:13,440 --> 00:02:15,450 10th 1981. 26 00:02:15,450 --> 00:02:17,080 Now this here is the time. 27 00:02:17,250 --> 00:02:25,920 So we have the hours the minutes the seconds if we want to add that we could go ahead and put in let's 28 00:02:25,920 --> 00:02:28,870 say 11. 29 00:02:28,880 --> 00:02:31,990 11:25 0 0. 30 00:02:32,220 --> 00:02:33,020 And save. 31 00:02:33,030 --> 00:02:35,870 And now you can see that the time has changed. 32 00:02:35,880 --> 00:02:37,460 All right. 33 00:02:38,130 --> 00:02:40,160 Now there's many ways to do this. 34 00:02:40,170 --> 00:02:46,180 I'm actually going to turn this into a let so that I can override this so that I can redeclare it. 35 00:02:46,240 --> 00:02:52,620 So I'm going to say let actual Just call I'll just copy this just to show you that there's other ways 36 00:02:52,620 --> 00:02:56,100 that we can create data so I can actually say 37 00:02:59,040 --> 00:03:08,260 September 10 1981 and save the birthday has already been declared. 38 00:03:08,280 --> 00:03:10,860 Oh you don't want to put that again. 39 00:03:11,220 --> 00:03:14,720 And you can see that it also gives us September 10. 40 00:03:14,960 --> 00:03:16,260 All right. 41 00:03:16,260 --> 00:03:19,290 We could also do it. 42 00:03:19,610 --> 00:03:20,360 Get rid of that law. 43 00:03:20,360 --> 00:03:21,660 We can also do it this way. 44 00:03:21,660 --> 00:03:29,060 It's a nine slash 10 slash 1981 and there's a lot of ways to do it so you may want to look at the documentation 45 00:03:30,800 --> 00:03:31,970 on what is it's 46 00:03:34,540 --> 00:03:45,040 javascript date object say so you know on the Mozilla on MDI and this will show you a lot of different 47 00:03:45,040 --> 00:03:48,350 things here and we're going to go over most of this. 48 00:03:48,400 --> 00:03:53,860 We're going to go over like you know the get date get DAY GET year all this stuff. 49 00:03:54,130 --> 00:03:58,750 But this gives you all the information about the date object. 50 00:03:58,750 --> 00:03:59,080 All right. 51 00:03:59,080 --> 00:04:03,360 So let's say we want to get the month. 52 00:04:03,370 --> 00:04:09,600 All right so I'm going to use today instead of birthday so say Val equals today Daut. 53 00:04:09,730 --> 00:04:12,030 Get month. 54 00:04:12,280 --> 00:04:17,710 Now if I say this you'll see it's going to log 10 and if you look at the date it's 11:09 it's actually 55 00:04:17,710 --> 00:04:18,850 November. 56 00:04:18,850 --> 00:04:21,490 But this is actually zero based. 57 00:04:21,610 --> 00:04:24,690 So zero would be January. 58 00:04:24,700 --> 00:04:33,880 And just to show you just real quick if I were to put in here 1 1 20:17 and save it'll give us zero 59 00:04:34,150 --> 00:04:35,380 as the month. 60 00:04:35,410 --> 00:04:36,650 OK. 61 00:04:36,700 --> 00:04:40,260 So just keep that in mind and that confuses a lot of people. 62 00:04:40,420 --> 00:04:52,160 If we want to get the date for the day of the month we could do that equals today Daut get date. 63 00:04:52,210 --> 00:04:57,460 So if we go ahead and save that we get nine and you can see that it is in fact 11:9. 64 00:04:57,460 --> 00:05:08,830 If we want to get the day we could say today Daut good day and save and we get four so we get a numerical 65 00:05:09,580 --> 00:05:12,850 representation of the day today is actually Wednesday. 66 00:05:12,850 --> 00:05:18,610 So it's basically going Sunday Monday Tuesday Wednesday which is the fourth day. 67 00:05:18,640 --> 00:05:18,970 All right. 68 00:05:18,970 --> 00:05:22,000 So we'll see if we can also get the. 69 00:05:22,000 --> 00:05:23,140 Year. 70 00:05:23,740 --> 00:05:28,140 So it's a well equals today. 71 00:05:28,160 --> 00:05:31,750 Dogs get a full year. 72 00:05:31,900 --> 00:05:33,490 That gives us 20:17 73 00:05:36,220 --> 00:05:40,790 we can also get the we can get we can deal with times. 74 00:05:40,790 --> 00:05:48,240 So if we want to get the hours we can say get ours which gives us 11. 75 00:05:48,480 --> 00:05:52,290 And if you look down here it's 11:20. 76 00:05:52,380 --> 00:05:53,690 We can get the minutes 77 00:05:57,800 --> 00:06:00,170 you look at that we get 21. 78 00:06:00,230 --> 00:06:01,400 It's 11:21. 79 00:06:01,400 --> 00:06:02,610 We can get seconds 80 00:06:09,900 --> 00:06:16,170 like that we get 14 and if I reload you see that that's going to change every second we can even get 81 00:06:16,170 --> 00:06:23,010 milliseconds if I want to do get milliseconds. 82 00:06:23,510 --> 00:06:32,500 Well actually it should be a lowercase s or flat wrong too or else. 83 00:06:32,580 --> 00:06:42,530 So that gives us mere seconds ago all right and then we can also get a time stamp the current time stamp 84 00:06:42,540 --> 00:06:49,530 so if we say Val equals today Daut get the time and save. 85 00:06:49,530 --> 00:06:51,080 That gives us the time stamp. 86 00:06:51,150 --> 00:06:51,440 OK. 87 00:06:51,450 --> 00:06:56,360 And that's going to change with every reload time stamp. 88 00:06:56,360 --> 00:07:02,120 It's basically the amount of time the amount of seconds that have passed since what is it January 1st 89 00:07:02,180 --> 00:07:03,740 1970. 90 00:07:04,280 --> 00:07:09,710 So another thing we can do is we can actually set all this stuff as well. 91 00:07:09,710 --> 00:07:18,740 So for instance let's take the birthday date we have up there and let's say Daut set month and we'll 92 00:07:18,740 --> 00:07:21,310 set it to high. 93 00:07:21,320 --> 00:07:23,170 And then I just want to log birthday 94 00:07:26,150 --> 00:07:29,170 and now we get March 10th. 95 00:07:29,280 --> 00:07:32,930 OK it started this September 10th but now it's March 10th. 96 00:07:33,290 --> 00:07:37,480 So we want to change. 97 00:07:38,210 --> 00:07:46,760 Let's do set a date and we'll set that to 12 so we'll save that. 98 00:07:46,760 --> 00:07:49,190 Now we get March 12. 99 00:07:49,190 --> 00:07:49,610 All right. 100 00:07:49,610 --> 00:08:02,680 We can also do a set full year and we'll set that to 19 let's say 1985 save. 101 00:08:02,690 --> 00:08:05,510 And now it's March 12th 1985. 102 00:08:05,510 --> 00:08:07,100 We can also set the time. 103 00:08:07,130 --> 00:08:09,280 So birthday does set 104 00:08:11,410 --> 00:08:13,640 hours. 105 00:08:13,840 --> 00:08:20,060 So that to say three save that now it's three o'clock 106 00:08:22,690 --> 00:08:26,730 two minutes. 107 00:08:27,080 --> 00:08:29,160 So so the minutes to 30. 108 00:08:29,160 --> 00:08:33,200 So now 3:30 and we can even set the seconds 109 00:08:37,400 --> 00:08:41,470 so that to I say 25. 110 00:08:41,480 --> 00:08:41,720 All right. 111 00:08:41,720 --> 00:08:47,330 So three thirty 25 so we can manipulate dates as well. 112 00:08:47,330 --> 00:08:47,830 All right guys. 113 00:08:47,830 --> 00:08:52,010 That's going to do it for dates if you want to learn a little more of both the date object. 114 00:08:52,010 --> 00:08:59,480 I'd suggest looking at the D.N. documentation but that's going to be it for now and the next video we're 115 00:08:59,480 --> 00:09:01,550 going to start to look at control structures. 116 00:09:01,550 --> 00:09:07,790 We're going to look at conditionals so if statements comparison operators and then we'll move on to 117 00:09:07,790 --> 00:09:10,850 switches and functions and all that good stuff. 118 00:09:10,850 --> 00:09:12,110 All right so that's it. 119 00:09:12,110 --> 00:09:13,700 I will see you in the next lecture.