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Snapchat Memories in Google Photos with the wrong date
People search this after they already imported. If you already uploaded the raw ZIP, delete those items (they are duplicates dated today) and upload the restored folder instead.
What Google Photos actually sorts on
Photos: DateTimeOriginal. Videos: QuickTime / MP4 creation time. Folder names are cosmetic. A Memories/2017 folder still displays as 2026 if EXIF says 2026.
Do not use “edit date” one by one
Google Photos can change a date per item. That does not scale to thousands of Snaps and it will not restore GPS. Fix the files, then let backup run.