pass time as cli option instead of arg

src/cli.rs

@@ -16,7 +16,7 @@ use std::iter;
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 pub struct Args {
-    #[arg(short, long)]
+    #[arg(short = 'z', long)]
     pub timezone: Vec<String>,
 
     #[arg(short, long)]
@@ -32,6 +32,7 @@ pub struct Args {
     #[arg(long)]
     pub list: bool,
 
+    #[arg(short, long)]
     pub time: Option<String>,
 }