Changing plot title through loop

Question

I am new to python and need your help. I have several dataframes. Each dataframe is for one day. So I am using for loop to plot for all dataframe. For each plot I want to add the date in my title. Can anyone help me. I have created a variable 'date_created and assigned the dates which I want. I want my title to look like below : 'Voltage vs time 28-01-2022'

for df in (df1,df2,df3,df4,df5,df6,df7,df8):
    y = df[' Voltage'] 
    x = df['time']
    date_created = [ '28-01-2022, 29-01-2022, 30-01-2022, 31-08-2022, 01-02-2022, 02-02-2022, 03-02-2022, 04-02-2022' ]
    fig, ax = plt.subplots(figsize=(18,7))
    plt.plot(x,y, 'b') 
    plt.xlabel("time")
    plt.ylabel(" Voltage [V]")
    plt.title("Voltage vs time")