group by function, make SQL cleaner?

I've got a working query:

stage=# SELECT date_trunc('day',endtime),count(*)
FROM eg_event where endtime >= '2006-02-01' and endtime < '2006-03-01'
GROUP BY date_trunc('day',endtime)
ORDER BY date_trunc('day',endtime);

date_trunc | count
---------------------+-------
2006-02-01 00:00:00 | 253
2006-02-02 00:00:00 | 245
2006-02-03 00:00:00 | 231
2006-02-04 00:00:00 | 313
2006-02-05 00:00:00 | 285
2006-02-06 00:00:00 | 194
2006-02-07 00:00:00 | 229
2006-02-08 00:00:00 | 239
2006-02-09 00:00:00 | 250
2006-02-10 00:00:00 | 245
2006-02-11 00:00:00 | 275

Is there a way to eliminate the ugly repeated use of
date_trunc('day',endtime)?