Date Lable duplicates in Every Year of April(Day-Light Saving) when Timezone is "Africa/Cairo"

### I'm Submitting a bug in Date value

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### Version
react-datetime : 3.2.0
moment-timezone : 0.5.43

### Steps to Reproduce
Set the displayTimeZone property value to 'Africa/Cairo'
Navigate to April month of any year.

### Actual Results
Duplicate date label is displayed for Last Friday of April month of any year.

### Expected Results
Can't Duplicate date label for Last Friday of April month of any year.

### Screen shot of the issue