Tableau add trend line to discrete data?

Question

Mostly my work is related to creating the reports on yearly or monthly or weekly data, So these visualizations are like a bar chart with trend lines. Since the dates are in DD/MM/YYYY format, so we can change them in continuous form but it skews the spacing on the X-Axis. This problem we can easily handle with the excel but how to do in Tableau? Because Visualisations are easy in Tableau than Excel.