Guide
Spreadsheet Date Format Normalization Guide
A guide for reading mixed date strings and display formats and outputting normalized date candidates.
Read date cells, text dates, Japanese notation, and era notation.
Choose YYYY-MM-DD, YYYY/MM/DD, or Japanese date notation.
Dates with unclear month/day order are marked for review.
What this generator is for
This generator creates an Apps Script that reads dates from a selected column and outputs normalized date candidates.
It is useful when dates are stored as mixed text values or inconsistent display formats.
The source sheet is not changed automatically, so users can review candidates before applying them.
Form input fields
Source spreadsheet URL or ID
Enter the Google Sheets file to use as the source. You can paste the full URL or only the file ID.
Source sheet name
The sheet that contains the data to process.
Header rows
The number of header rows at the top of the source sheet. Usually this is 1.
Target column
Column containing the values to format.
Output date format
Date format to use for output candidates.
Review sheet name
Sheet name where review results will be written.
Setup steps
Open Apps Script
Open Apps Script from the target spreadsheet.
Paste the script
Paste the generated Code.gs. Back up existing code before replacing it.
Run initial setup
Run the setup function from the function dropdown to create the review sheet and menu.
Reload the spreadsheet
After setup finishes, reload the spreadsheet so the KOKOCAL menu appears.
Run from the menu
Run the generated tool from the menu and review the output sheet.
Save the implementation guide
After generation, use Download setup guide at the top right of the generated result column to save the information needed for setup. Generated results disappear when you leave the page, so saving the guide before setup is recommended.
What the guide includes
The setup method, post-setup review points, generated script, settings JSON, and config hash are collected in one document. The setup method starts with a note that the generated script appears later in the guide.
Available formats
Choose Markdown (.md), Word (.docx), or the PDF save view.
Post-setup review points
Candidate output
Confirm that expected candidates are output to the review sheet.
No source modification
Confirm that source sheet values, row count, and column count are not changed.
Review required
Confirm that uncertain values are not forced and are marked for manual review.
Notes
Review before use
Review this point before using the generated script in production.
Important note
Review this point before using the generated script in production.
Important note
Review this point before using the generated script in production.
Ready to generate the script
Read mixed date strings and display formats, then output conversion candidates to a review sheet without changing source data.