Date: Japanese calendar support

[zztkm]

Description
I am writing a program to convert an Excel file to csv using Excelize.
Basically, Excelize works well, but it cannot read the date format if the format is a date and Japanese calendar.

I read the source code and found that the Japanese calendar format does not seem to be supported.

I would like to see it supported if possible.

Steps to reproduce the issue:

1. Excel cell formatting > Date > local: Japanese, Calendar type: Japanese
   • example cell view: 令和３年６月３０日 (this is 2021/06/20)
2. Write the line obtained by excelize.Rows.Columns() to csv

Describe the results you received:
44377

Describe the results you expected:
I wanted to get 令和３年６月３０日 as it appeared in Excel

Output of go version:

go version go1.20.6 darwin/arm64

Excelize version or commit ID:

v2.7.1

Environment details (OS, Microsoft Excel™ version, physical, etc.):

• Windows server 2012 R2
• Microsoft Excel for Microsoft 365 MSO (version 2301 build: 16.0.16026.20196)

[xuri]

Thanks for your issue. I have added support for the Japanese calendar, please try to upgrade the master branch code, and this feature will be released in the next version.

[zztkm]

@xuri Thanks for your support!
Looking forward to the next version!