> For the complete documentation index, see [llms.txt](https://docs.influxtechnology.com/support_guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.influxtechnology.com/support_guides/dialog-user-guide/appendix-3.md). # Appendix 3 ## Processing rules for converting GPS date and time to real date and time. Formula: =(A1/86400) +25569 The result will be in GMT (A1 is the cell with the GPS Time data from Rebel). For other time zones: = ((A1 +/- time zone adjustment) / 86400) + 25569. For time zone adjustment value: \= ((A1+19800)/86400) +25569 (For Indian Standard Time) Then format the number to the Custom date and time format:

So, it turns this number from the logger into this date and time:

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