## How do I compare two dates in Perl?

3 Answers. If the dates are ISO-8601 (ie, YYYY-MM-DD) and you do not need to validate them, you can compare lexicographically (ie, the lt and gt operators.) If you need to validate the dates, manipulate the dates, or parse non standard formats — use a CPAN module. The best, IMHO, are DateTime and DateCalc.

## How do you calculate the date difference between weeks?

To calculate the number of weeks between two dates, start by counting the number of days between the start and end date. Then, divide that number by 7 days per week.

**How do I calculate the difference between today and another date in Excel?**

Use the DATEDIF function when you want to calculate the difference between two dates. First put a start date in a cell, and an end date in another….Calculate age in accumulated years, months, and days

- Use DATEDIF to find the total years.
- Use DATEDIF again with “ym” to find months.
- Use a different formula to find days.

**How do you compare date and time?**

The DateTime. Compare() method in C# is used for comparison of two DateTime instances….DateTime. Compare() Method in C#

- <0 − If date1 is earlier than date2.
- 0 − If date1 is the same as date2.
- >0 − If date1 is later than date2.

### How do I calculate days difference between dates in Excel?

Just subtract one date from the other. For example if cell A2 has an invoice date in it of 1/1/2015 and cell B2 has a date paid of 1/30/2015, then you could enter use the formula =B2-A2 to get the number of days between the two dates, or 29.

### How do you calculate days in a calendar?

Here is a standard method suitable for mental computation:

- Take the last two digits of the year.
- Divide by 4, discarding any fraction.
- Add the day of the month.
- Add the month’s key value: JFM AMJ JAS OND 144 025 036 146.
- Subtract 1 for January or February of a leap year.

**How to print current date and time in full format in Perl?**

If you will use localtime() function in scalar context, then it will return date and time from the current time zone set in the system. Try the following example to print current date and time in full format −. Live Demo. #!/usr/local/bin/perl $datestring = localtime(); print “Local date and time $datestringn”;

**How many days are there between two dates?**

Indeed, if you want to split the time between the two dates in 24-hour chunks, there are only about 2.07 days between them. Depending on your application, you might want to truncate or round this number.

## How to calculate dates relative to a given date in Python?

In order to calculates dates relative to a given date we can use DateTime::Duration objects. After loading the module into memory we can create DateTime::Duration objects and use them to add to DateTime object or to subtract from them. The output of the above code is:

## How to print current date and time in full format in Python?

Try the following example to print current date and time in full format − The function gmtime () works just like localtime () function but the returned values are localized for the standard Greenwich time zone. When called in list context, $isdst, the last value returned by gmtime, is always 0.