Here is a fabulous New Year gift to you. A free 2025 Calendar Excel Template with built-in Activity planner. This is a fully dynamic and 100% customizable Excel calendar for 2025.
- See the calendar for entire year in a single view
- Dynamic any month calendar with detailed plan view
- Beautifully formatted and ready to print 12 month calendar view
- Automatic updation of holidays, weekends and activities
- Snapshot of upcoming activities
- Fully customizable – start on any day, any weekend, custom holidays
- Optimized for screen and print outs
Click the below button to download the free 2025 calendar template.
Compatibility
This calendar is compatible with Excel 365. It uses modern dynamic formula techniques to automatically generate the calendar, planner and month views.
If you have an older version of Excel (such as 2019 or 2016, 2013) then please use this alternative version.
How to use the 2025 Calendar Workbook?
The calendar & planner file has 4 tabs.
- Calendar tab: See the 12-month calendar view + upcoming activities in this page. It also highlights any holidays, weekends and planned activities on the calendar in a different color.
- Any month tab: This page lets you see the calendar for any specific month in a detailed view. You can change the month from cell C3 and the calendar updates automatically. The calendar shows date, any activities planned in a neat grid view.
- Printable 12 Month Calendar: This tab presents an elegant and ready-to-print 12 month calendar. You can print it or save this as PDF to generate all the 12 pages instantly. The colors and fonts are also fully customizable.
- Planner tab: Use this tab to set up your activities. Whatever items you list here will automatically show up on the calendar & any month tabs.
- Customizations tab: Do you want to change the way your week begins? Need to add some holidays or change the icons? Use the customizations tab.
How is this calendar made?
The calendar workbook has two main components.
- Calendar
- Planner
Calendar Generation
To generate the calendar, I am using the dynamic array functionality of Excel 365. We can use the SEQUENCE function to create all the dates in any given year.
For example, =SEQUENCE(365,,DATE(2025,1,1)) generates all the 365 dates in the year 2025.
I then used the same logic to generate monthly calendars for all the 12 months and adjusted them based on the week start option.
Once the monthly calendars are generated, then I highlighted the weekends, holidays and activities using conditional formatting.
Activity Planner
You can set up any number of activities in the planner table. I am then using FILTER function to filter out the activities for a given day and show them next to the calendar date.
Also, if “highlight activities” is enabled, then I am highlighting the calendar cells in a different color.
In the 12-month calendar view, I am showing upcoming 10 activities using FILTER function too.
Interactive any month calendar page:
We use the same logic as above, but limit it to a selected month (with data validation drop-down) to show the calendar for any specific month. Here is the calendar for August 2025.
Know more about these calculations
If you want to learn more about the calculations and set up of this workbook, please refer to these articles + videos.
- Dynamic array functions in Excel – introduction to FILTER, SEQUENCE etc.
- Conditional formatting to highlight values in Excel
- Data validation to select a month in Excel cell
- Excel tables – How to create a simple tracker in Excel
- Video: How to use FILTER function in Excel
Previous year calendars – 2024 Calendar, 2023 Calendar, Free Excel templates & files
8 Responses to “Pivot Tables from large data-sets – 5 examples”
Do you have links to any sites that can provide free, large, test data sets. Both large in diversity and large in total number of rows.
Good question Ron. I suggest checking out kaggle.com, data.world or create your own with randbetween(). You can also get a complex business data-set from Microsoft Power BI website. It is contoso retail data.
Hi Chandoo,
I work with large data sets all the time (80-200MB files with 100Ks of rows and 20-40 columns) and I've taken a few steps to reduce the size (20-60MB) so they can better shared and work more quickly. These steps include: creating custom calculations in the pivot instead of having additional data columns, deleting the data tab and saving as an xlsb. I've even tried indexmatch instead of vlookup--although I'm not sure that saved much. Are there any other tricks to further reduce the file size? thanks, Steve
Hi Steve,
Good tips on how to reduce the file size and / or process time. Another thing I would definitely try is to use Data Model to load the data rather than keep it in the file. You would be,
1. connect to source data file thru Power Query
2. filter away any columns / rows that are not needed
3. load the data to model
4. make pivots from it
This would reduce the file size while providing all the answers you need.
Give it a try. See this video for some help - https://www.youtube.com/watch?v=5u7bpysO3FQ
Normally when Excel processes data it utilizes all four cores on a processor. Is it true that Excel reduces to only using two cores When calculating tables? Same issue if there were two cores present, it would reduce to one in a table?
I ask because, I have personally noticed when i use tables the data is much slower than if I would have filtered it. I like tables for obvious reasons when working with datasets. Is this true.
John:
I don't know if it is true that Excel Table processing only uses 2 threads/cores, but it is entirely possible. The program has to be enabled to handle multiple parallel threads. Excel Lists/Tables were added long ago, at a time when 2 processes was a reasonable upper limit. And, it could be that there simply is no way to program table processing to use more than 2 threads at a time...
When I've got a large data set, I will set my Excel priority to High thru Task Manager to allow it to use more available processing. Never use RealTime priority or you're completely locked up until Excel finishes.
That is a good tip Jen...