import std/strformat
import std/times
import strutils

let timestamps: seq[int64] = @[
    161252911000,
    162352411900,
    1646927061000,
    166691206100000
]

echo "formatted UNIX dates"
for i in timestamps:
    var s: string = $i
    if len(s) > 10: s = s[0 .. 9]
    let datetime = times.fromUnix(parseInt(s))
    let datetime_fmt = datetime.format("yyyy-MM-dd HH:mm:ss")
    echo &"  {s} :  {datetime_fmt}"