1. First open the Excel table, enter "time and month" in any cell and enlarge the column width of the table;
2. Then put the mouse cursor on the cell of "Time Month" and right click, and select "Format Cell" in the pop-up drop-down menu;
3. Find the "Border" button in the pop-up "Cell Format" dialog box, and click;
4. Click "Border", then select "Diagonal" border in the interface and click;
5. After clicking "Slash", a slash text will appear, and click "OK";
6. Click "OK" to display the effect as shown in the figure, and then adjust the font;
7. Double-click the cell to place the mouse cursor between the time and month, and then press "ALT+ ENTER" to set the time and month to up and down;
8. If you need to adjust after adjusting to up and down, just double-click the mouse to put the cursor in front of the font and press the space bar to adjust.