Below is my code where I need to display calendar with month and year and when user selects month and year it should display last day of that month with year. I am able to get the date as 01 June 2022 using below code, where as I need date as 30 June 2022
Quickest way is using a library like moment (depreacated) or dayjs. Take the date you get from datepicker, and use it with the library to get the end date of the month-year.
Change the dateInputFormat to YYYY-MM-DDDD in the bsConfig.
Inside your getDate() function process the datePicker date to get proper format.
Example code:
const date = '2022-06-01';
console.log('Print date: ', moment(date).endOf('month').format('DD MM YYYY'));
Result:
Context
So I am currently building a database of data for financial assets to conduct some machine learning from to build trading signals. I am trying to calculate the geometric mean but over a given period (monthly). I want to tell google sheets to only calculate the geometric mean after every month. I tried using this formula to no avail:
=IF(last date of the month - first date of month = total days in a month,
GEOMEAN(filter(abs(range),abs(range)>0)),""))
** There were values in the last date of the month - first date of month = total days in a month **
It ended up doing it for every day for the 10 year data set.
** Update
This is the data:
Date Close Cleaned Data Returns Gross returns Geometric average returns
13/11/2015 280 -0.0267 0 1
16/11/2015 280 -0.0267 0 1
17/11/2015 280 -0.0267 0 1
...
23/12/2016 296.4 0.0236 -0.1561348935 0.8438651065
28/12/2016 295.2 0.0199 -0.0770931339 0.9229068661
29/12/2016 294.7 0.0183 0.03341318035 1.03341318
30/12/2016 294.9 0.0190 0.3718276303 1.37182763
Problem (UPDATE)
How do I create a function to let google sheet do calculations only for the last day of every month for a given time series data? Say within this time period, (1 year) I want to calculate the geometric mean for each month in this period and for new data I might want to add later in the future.
To do this you will have to set a trigger event. This is found within the script editor under the edit tab, second to last option.
Image of where to find the trigger manager: It's in spanish, but it will be found in the same place
Once there, click on add trigger, which will be found on the bottom right corner. The first option will ask you which function do you want to run from the bound script. Then select the source of the event and select according to time (My platform is in spanish so I'm trasnlating it you might have it written differently). Then it will prompt you: if you want it to be at an exact date and time, every minute, every hour, day, week and month. Select month and select the day of the month you want the trigger to happen in the next prompt and select the time for the last prompt, then click save.
Finding the last day of a month:
function lastdayOfMonths() {
let html='';
let td=new Date();
for(var i=0;i<12;i++) {
let dt=new Date(td.getFullYear(),td.getMonth()+i+1,0);
let dts=Utilities.formatDate(dt, Session.getScriptTimeZone(),"E MMM dd,yyyy");
html+=Utilities.formatString('<br />%s',dts);
}
SpreadsheetApp.getUi().showModelessDialog(HtmlService.createHtmlOutput(html), "Last Days of Months for next year");
}
I know this looks simple.
In a Google spreadsheet, I have a column where I enter time in one timezone (GMT)
And another column should automatically get time in another time zone(Pacific Time)
GMT | PT
----------|------------
5:00 AM | 9:00 PM
As of now I am using
=$C$3-time(8,0,0)
The problem here is, I want to change the time formula for Daylight savings.
Is there any function or script available which can take the daylight saving into calculation automatically.
Short answer
There is no built-in function but you could build a custom function.
Example
/**
* Converts a datetime string to a datetime string in a targe timezone.
*
*#param {"October 29, 2016 1:00 PM CDT"} datetimeString Date, time and timezone.
*#param {"Timezone"} timeZone Target timezone
*#param {"YYYY-MM-dd hh:mm a z"} Datetime format
*#customfunction
*/
function formatDate(datetimeString,timeZone,format) {
var moment = new Date(datetimeString);
if(moment instanceof Date && !isNaN(moment)){
return Utilities.formatDate(moment, timeZone, format)
} else {
throw 'datetimeString can not be parsed as a JavaScript Date object'
}
}
NOTE:
new Date(string) / Date.parse(string) implementation in Google Apps Script doesn't support some timezones abbreviations.
From https://tc39.es/ecma262/#sec-date-time-string-format
There exists no international standard that specifies abbreviations for civil time zones like CET, EST, etc. and sometimes the same abbreviation is even used for two very different time zones.
Related
Get UTC offset from timezone abbreviations
Explanation
In order to consider daylight saving time zones the input argument for of the value to be converted should include the date, no only the time of the day. You could set a default date and time zone to build the datetimeString by concatenating it before calling the formula.
=formatDate("October 29, 2016 "&A2&" GMT","PDT","hh:mm a")
For the target timezone besides the three letter abbreviation we could use TZ database names like America/Los_Angeles, example:
=formatDate("October 29, 2016 "&A2&" GMT","America/Los_Angeles","HH:mm")
If timezone abbreviation and TZ name fails for the datetimeString use time offsets (i.e. UTC-4).
See also
Calculating year, month, days between dates in google apps script
References
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date
This tutorial was amazingly helpful: https://davidkeen.com/blog/2017/01/time-zone-conversion-in-google-sheets/
Google Sheets does not have a built in way of converting time zone data but by using the power of Moment.js and Google’s script editor we can add time zone functionality to any sheet.
These are the files I copied into my script project:
https://momentjs.com/downloads/moment-with-locales.js saved as moment.js
https://momentjs.com/downloads/moment-timezone-with-data.js saved as moment-timezone.js
Make sure you add the moment.js script first and have it above the moment-timezone.js script because moment-timezone.js depends on it.
Then in your other script project, your Code.gs file can look like this:
var DT_FORMAT = 'YYYY-MM-DD HH:mm:ss';
/**
https://stackoverflow.com/questions/34946815/timezone-conversion-in-a-google-spreadsheet/40324587
*/
function toUtc(dateTime, timeZone) {
var from = m.moment.tz(dateTime, DT_FORMAT, timeZone);//https://momentjs.com/timezone/docs/#/using-timezones/parsing-in-zone/
return from.utc().format(DT_FORMAT);
}
/**
https://stackoverflow.com/questions/34946815/timezone-conversion-in-a-google-spreadsheet/40324587
*/
function fromUtc(dateTime, timeZone) {
var from = m.moment.utc(dateTime, DT_FORMAT);//https://momentjs.com/timezone/docs/#/using-timezones/parsing-in-zone/
return from.tz(timeZone).format(DT_FORMAT);
}
The easiest method is using a simple calculation.
Use =NOW() command in sheets and subtract it with the time difference divided by 24.
Example:
IST to Colombia
=NOW()-(10.5/24)
The time difference from India to Colombia is 10hours and 50min, we need to subtract it from the "Now" time and divide it by 24.
If the time zone is ahead of your place, then you need to add it.
Example:
IST to JAPAN:
=NOW()+(3.5/24)
=Now is set to US time by default, you can change it under general in settings.
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I had the same problem (convert Manila Time to Sydney Time and automatically adjust for daylight saving time) when I found this page.
I didn't want to have a custom function but I found that, in Sydney, AEST (Australian Eastern Standard Time) starts on the first Sunday of April and AEDT (Australian Eastern Daylight Time) starts on the first Sunday of October.
So I thought, if I could find a formula that detects whether a date falls between the first Sunday of April and first Sunday of October (Standard Time) then I can automatically add 1 hour to the usual 2 hours to Manila time during Daylight Saving Time (dates falling outside the two dates) to have Sydney Time.
These two Excel solutions worked fine in Google Sheets:
How You Can Determine the First Sunday in a Month in Excel
How to determine if a date falls between two dates or on weekend in Excel
First Sunday of April this year (A1):
=CONCATENATE("4/1/",Year(today()))+CHOOSE(WEEKDAY(CONCATENATE("4/1/",Year(today())),1),7,6,5,4,3,2,1)
First Sunday of October this year (A2):
=CONCATENATE("10/1/",year(today()))+CHOOSE(WEEKDAY(CONCATENATE("10/1/",year(today())),1),7,6,5,4,3,2,1)
DST detector (A3) — if a date falls outside these two dates, it's DST in Sydney:
=IF(AND(today()>A1,today()<A2),"AEST","AEDT")
Time in Sydney (A4):
=NOW()+TIME(IF(A3="AEDT",3,2),0,0)
NOW() can be changed to any time format for tabulation:
I'm a new contributor and a novice, but I stumbled upon a function that had not been mentioned despite many hours of searching on the Sheets/Time Zone issue. Hoping this relatively simple solution will help.
For my sheet, I just want to add a row and automatically populate the local sheet date and time in the first two cells.
The .getTimezoneOffset() returns the difference in minutes between the client TZ and GMT, which in NY during Daylight Savings Time is 240. The function returns a positive number for the zones with "GMT-x", and vice versa for zones with "GMT+x". Hence the need to divide by -60 to get the correct hour and sign.
function addRow() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getActiveSheet();
sheet.insertRows(2, 1);
rightNow = new Date();
var tzOffset = "GMT" + rightNow.getTimezoneOffset() / -60;
var fDate = Utilities.formatDate(rightNow, tzOffset, "MM-dd-yyyy");
var fTime = Utilities.formatDate(rightNow, tzOffset, "HH:mm");
sheet.getRange('A2').setValue(fDate);
sheet.getRange('B2').setValue(fTime);
sheet.getRange('C2').setValue(tzOffset);
}
I've since found that I'm not the first person to respond to the GMT correction connundrum mentioning .getTimezoneOffset(). However, this thread has the most views on this topic, so I figured this option deserves a mention.
DST ends here on November 7th, 2021, so I'll report back if it doesn't adjust as expected to "GMT-5"
.getTimezoneOffset()
That can also be done without macros. Just using functions and data manipulation will suffice. Explaning the whole process here would be a bit cumbersome. Just do your research on how the various time functions work and use your creativity.
Hint: Use =NOW() if you want both current date and time. You'll actually need that if you need to find out the precise diff in time between to different dates.
Use =NOW()-INT(NOW()) when you only want the time (with date truncated if both times fall on the same date). Then format the corresponding cell or cells for time (i.e. 4:30 PM), not for date-time (3/25/2019 17:00:00). The latter is the format you'd use when you want to show both date and time... like when you use NOW().
Also search online for the Daylight Saving Time offset for the various standard time zones (PT, MT, CT, ET, AT) with respect to the Coordinated Universal Time (UTC). For example, in 2019 the offset for Pacific Time is UTC-7 when DST is observed starting on March 10 at 2 AM (Pacific) until November 3 at 2 AM. That means that the difference in time from UTC to Pacific is 7 hours. During the rest of the year is 8 hours (UTC-8). During DST observance starting sometime in March (the 10th this yr) it goes from PST to PDT by moving clocks forward 1 hr, or what we know as UTC-7 (that's summer time). After DST observance it goes from PDT to PST by moving clocks back 1 hr again, or what we know as UTC-8 (or winter time). Remember that the clock is advanced one hour in March to make better use of time. That's what we call DST, or Daylight Saving Time. So after March 8 at 2 AM (this year in 2019) we are in UTC-7. In November, we do the opposite. In Nov 3 at 2 AM the clock is taken back one hour as the winter kicks in. At that point we are back in Standard Time. Seems a bit confusing but it's really not.
So, basically, for folks in PT they go from PST to PDT in March and from PDT to PST in November. The exact same process goes on with Mountain Time, Central Time and Eastern Time. But they have different UTC time offsets. MT is either UTC-6 or UTC-7. CT is either UTC-5 or UTC-6. And ET is either UTC-4 or UTC-5. All depending on whether we are in summer time when Daylight Saving is observed to make better use of daylight and working hours, or in winter time (AKA, Standard Time).
Study these thoroughly and understand how they work, and play around with the various time functions in Excel or Google Sheets like the TIME(#,#,#) and NOW() functions and such, and believe me, soon you'll be able to do about anything like a pro with plain functions without having to use VBA Google Apps Script. You can also use the TEXT() function, though, with tricks like =TEXT(L4,"DDD, MMM D")&" | "&TEXT(L4,"h:mm AM/PM"), where L4 contains you date-timestamp, to display time and date formats. The VALUE() function also comes in handy every now and then. You can even design a numerical countdown timer without the use of macros. You'd need to create a circular reference and set iterations to 1, and time display to say every 1 min, in your spreadsheet settings for that.
The official timeanddate dot com website is a good source of info for all to know about time zones and how daylight time is handled. They have all UTC offsets there too.
Create your own Timezone Converter in Google Sheets:
Step 1: Create your table for the timezone converter.
Step 2: Enter the times for your time zones in a column.
Note: Ensure that you select date/time format(Select Cell(s) -> Format -> Number -> Time/Date)
Step 3: Write a formula to convert timezone using the following functions
Google Sheet Functions
=HOUR(A8)+(B3*C3) converts the hours.
=MINUTE(A8)+(B3*C3) converts the minutes.
Step 4: Convert back to time format using TIME(h,m,s) function
=TIME(HOUR(A8)+(B3*C3), MINUTE(A8)+(B3*C3), SECOND(A8))
This is a simple way to convert timezones.
However, if you want to implement an accurate timezone converter that takes care of the previous day, next day, and beyond 24 hours, beyond 60 minutes, please use MOD operations and handle all the cases.
Visit(or Use) this google sheet for reference:
https://docs.google.com/spreadsheets/d/1tfz5AtU3pddb46PG93HFlzpE8zqy421N0MKxHBCSqpo/edit?usp=sharing
just use the TZData format to "pull" a sync from UTC and display your choice.
Example in order to "change" the display of your cell to Berlin local time
=fromUTC(N82, "Europe/Berlin")
or for Tokyo
=fromUTC(N82, "Asia/Tokyo")
or San Francisco
=fromUTC(N82, "America/Inuvik")
point of reference for Time Zones is here >>
https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
The day of week returned seems wrong sometimes. Today I executed in Google App Script engine:
Logger.log(Utilities.formatDate(new Date(), "Europe/Madrid", "yyyy-MM-dd F"))
The result was:
[15-10-26 18:18:42:037 CET] 2015-10-26 4
The problem is the final F which is translated to 4, which corresponds to Thursday. However, today is Monday, right?
The worst thing is that if I add four days to this date, I get the correct one 5 which is "Friday"
[15-10-26 18:19:50:012 CET] 2015-10-30 5
What's wrong with this code ?
"F" is the nth occurrence of the weekday in the month.
Today is the fourth Monday of the Month, Friday will be the fifth Friday of the month.
You probably want to use "yyyy-MM-dd u"
How can I get the week day for 20110828 (28th of August 2011)?
I've tried this, but it didn't work:
var date:Date=new Date(2011,8,28);
//Also tried var date:Date=new Date(20110828);
trace(date.day);//0 - Sunday, 1 - Monday etc
Thank you.
I think you want the Date.getDay() method:
Returns the day of the week (0 for Sunday, 1 for Monday, and so on) specified by this Date according to local time. Local time is determined by the operating system on which the Flash runtimes are running.
The problem was that month 8 in AS is really month 9 in real life.