Question

Does JX-Series have a calendar function?

Answer

JX-BASIC

JX-BASIC dose not have a calendar function.

JX-BASIC-EX1/EX2

JX-BASIC-EX1 and JX-BASIC-EX2 have a calendar function.
The real-time clock is backed up by a built-in battery.
The backup period is approximately 1 month when fully charged.