GRADS 画温度平流随时间的剖面图，如何修改横坐标时间

believefuture

'reinit''clear''open g:\datafiles\fnl_20180101_00_00.ctl''set grads off''set grid off''set lon 90 125''set lat 10 35''set lev 1000 200'
'set t 9 20''define pi=3.1415726/180.0'*'define vor=hcurl(ugrdprs,vgrdprs)''define r=6.356e6''define dtx = cdiff(tmpprs,x)''define dty = cdiff(tmpprs,y)''define dx=cdiff(lon,x)*cos(lat*pi)*pi*r''define dy=cdiff(lat,y)*pi*r''define advT=-(ugrdprs*dtx/dx+vgrdprs*dty/dy)'
'set lon 117''set lat 33''set zlog on'
'set gxout contour''set cint 5''set ccolor 1'
'd advT*1e5''set display color white'
'gxprint g:\Pic\t-adv-117-33.png'在论坛学习的如何画温度平流，出来的图的横坐标时间想改成0308，0314，0320....这种，有遇到过这种情况的同学吗，如何修改gs变成想要的这种时间坐标轴呀

river

set xlabs