change date format in excel

YOU.com answered on March 20, 2021 Popularity 10/10 Helpfulness 1/10

answer change date format in excel

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change date format in excel

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# Importing the necessary libraries
from openpyxl import load_workbook
from openpyxl.styles import numbers

# Filename of the Excel file
filename = 'path/to/your/file.xlsx'

# Name of the sheet containing the dates
sheet_name = 'Sheet1'

# Load the workbook
workbook = load_workbook(filename)

# Select the desired sheet
sheet = workbook[sheet_name]

# Iterate through the cells in the desired range
for row in sheet.iter_rows(min_row=1, min_col=1, max_row=sheet.max_row, max_col=sheet.max_column):
    for cell in row:
        # Check if the cell value is a date or datetime
        if cell.data_type == 'd' or cell.data_type == 'n':
            cell.number_format = numbers.FORMAT_DATE_DDMMYYYY  # Change the date format to your desired format

# Save the modified workbook
workbook.save('path/to/your/modified_file.xlsx')

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Contributed on Sep 12 2023

YOU.com

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Assuming that you source date that is in the number format dd.mm.yyyy stored as an excel date serial and only formatted to display as dd.mm.yyyy then the best fix is to select the cells you want to modify. Go to your home tab, and select the number format and change it to General. See Green circles in image below. IF the format is already set to general, or when you switch it to general your numbers do not change, then it is most likely that your date in dd.mm.yyyy format is actually text. and will needed to be converted as per OPTION 2 below. However, if the number does change when you set it to general, select the arrow in the bottom right corner of the number area (see red circle).

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Tags: date-format date

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Contributed on Mar 20 2021

Santino

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change date format in excel

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