"Twentieth Day of the Fourth Month" Clue-less? UR a 'Growing' Trend

One Across: And three boxes in which to enter the three letters in response to the clue, "away from work"...If they'd only let me use a combo and letters and number, I totally got this! But no, they won't indulge me even on a day such as this. So, now "man!" (a word that predated "dude" for us Cheech and Chonger's) I have to come up with another reason why so many employees will probably be a "no call, no show" today...followed by excuses but sans apology, maybe even with a bit of attitude, the past few years (e.g., "what's the problem, no big deal, everyone's doin' it these daze..."). And what an irony, I thought, that many of these who are part of the vaping hole in the economy, will be among the millions who turn out two days from now, complaining about the quality of air...which I guess they'll reconcile in part by planting, growing...And in a moment of early reflection, even as I prepped for posting this post, that it's been over a year that I 4-warned I would be posting a series on "Revoke the Toke!". But given the date on the calendar, probably not the write day for it. I'll get back to you on this..."dude"! But in the meantime, if you want to get in the right mood for 4/20 day, watch the movie us boomers grew, grooved with..."Up in Smoke"🦨🤿