Small "bug/typo" found in Search Archive

Looks like someone either doesn’t like Valentine’s day … or they were in a hurry for spring!

When cycling through the Months, you get January, March, March, April …

((Hopefully I dropped this in the proper “Place” … If not I apologise in advance))

Which plugin is this?

Monitoring Service as it looks

I have just installed Monitoring Service 1.5.0 and i don’t see such issue. February is in there.