@OSBSS, I'll echo perky's comment. Very nice job! Good work!
I do have one question, I didn't realize that you were using SD card along with the DS3234, Radio, and display(?) all on the same SPI link. I have had problems using SD card with other SPI devices, where I had an open SD file that contained a log and I'd alternate between device and SD card access. I haven't had a problem sharing when the IO operation was 'atomic', ie, open the file, write, close it and then use SPI on a different device. Have you had any issues? What SD library are you using?
Tom