If an ATC instruction of "hold short" is being issued to you ,e.g. today (31st Dec) and you don't hear anything else, it means you're not moving until next year
or least until ATC tells you otherwise.
Hold short of a runway means stop before the CAT I/II/III signs/marking at the holding point. The aircraft must not pass the line! A fingernail passed the yellow line is deemed to be a runway incursion and you're in big trouble with ATC (reporting action).
Always if you're unsure = ASK
PS. Happy New Year, hope you have moved by now
