An alternative from The Guardian Style Guide:

times

 

1am, 6.30pm, etc; 10 o'clock last night but 10pm yesterday; half past two, a quarter to three, 10 to 11, etc; for 24-hour clock, 00.47, 23.59; noon, midnight, not 12 noon, 12 midnight;

An alternative from The Guardian Style Guide:

times

1am, 6.30pm, etc; 10 o'clock last night but 10pm yesterday; half past two, a quarter to three, 10 to 11, etc; for 24-hour clock, 00.47, 23.59; noon, midnight, not 12 noon, 12 midnight;

Another alternative from The Guardian Style Guide:

times

1am, 6.30pm, etc; 10 o'clock last night but 10pm yesterday; half past two, a quarter to three, 10 to 11, etc; for 24-hour clock, 00.47, 23.59; noon, midnight, not 12 noon, 12 midnight;

An alternative from The Guardian Style Guide:

times

1am, 6.30pm, etc; 10 o'clock last night but 10pm yesterday; half past two, a quarter to three, 10 to 11, etc; for 24-hour clock, 00.47, 23.59; noon, midnight, not 12 noon, 12 midnight;