Connct the iPod to your Mac.
When it appears in iTunes, select it.
On the device menu (Summary, Info, Apps, etc) select "Info"
Is "Sync Calendars" checked and are "All Calendars" selected?
If not, please enable both and click Apply/Sync.
Note: if this does not work OR it tells you that your calendars are being synced via iCloud on this page, please let me know.
Hopefully, this info will answer your question and if so please don't forget to positively rate my service
. If you continue to have questions on this topic, just reply back to this discussion prior to rating
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Thanks and good luck,