inconsistent missing dates

Hi there,
I wonder if anyone have any problem with the dates at the bottom (or beginning, whichever one prefer) of their blog?
Some dates are shown while some went missing.
For instance, it is supposed to be:
slotted in: General at 12:38 pm (EST) on [the missing date] | comments (0)
I thought it was my browser but I tested on two and it was still the same.
If there’s any scripting error, I don’t even know where to begin looking ….
My url is: https://blog.bohemianphilosophy.com
Would appreciate if anyone can help. Thanks !